Presented by

William Clough President & CEO

Daniel Ford CFO

Corporate Presentation May 2013 NASDAQ:CUI

2

SEC Disclaimer

Forward-Looking Statements This document contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such statements are subject to risks and uncertainties that could cause actual results to vary materially from those projected in the forward-looking statements.

The company may experience significant fluctuations in future operating results due to a number of economic, competitive, and other factors, including, among other things, our reliance on third-party manufacturers and suppliers, government agency budgetary and political constraints, new or increased competition, changes in market demand, and the performance or reliability of our products.

These factors and others could cause operating results to vary significantly from those in prior periods, and those projected in forward-looking statements. Additional information with respect to these and other factors, which could materially affect the company and its operations, are included in certain forms the company has filed with the Securities and Exchange Commission.

Financial figures related to the acquisition of Orbital Gas Systems Limited contained in this presentation have been converted from British Pounds Sterling (£) to US Dollars ($) using an exchange rate of £1.00 = $1.5229 as of March 22, 2013.

Business Overview

19.6

26.4

37.6 38.9 41.1

$0

$5

$10

$15

$20

$25

$30

$35

$40

$45

FY'08

FY'09

FY'10

FY'11

FY'12

• Established......................................

• Headquarters..................................

• Ticker..............................................

• Market Cap (4/1/13) .......................

• Employees.......................................

• FY ‘12 Revenue………………..........

CUI Global Historical Operations Overview

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• 24 years experience

• Niche component designer for a variety of industries

• 50,000+ unique customers

• 50+ countries

• Healthy back-log of $14.2 million, up 50% year-on-year

• Mid-30% gross margins in base business

• Emerging product lines to drive growth

CORPORATE OVERVIEW

1989

Tualatin, Oregon

CUI

$54.5 million

> 60 worldwide

$41.1 million

OPERATIONS OVERVIEW HISTORICAL REVENUES(1)

$ in millions

Note: (1) Represents revenues from continuing operations, excluding revenues related to our divestiture of Comex Electronics Ltd. in 2011

Tualatin, Oregon Quality control,

R&D, sales, logistics

Tokyo, Japan Quality control, R&D,

sales, logistics

9.5 9.7

12.8 13.8 14.0

£0

£2

£4

£6

£8

£10

£12

£14

£16

FY'08

FY'09

FY'10

FY'11

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Orbital Gas Systems Limited Operations Overview

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• Established.......................................

• Headquarters....................................

• Ticker.................................................

• Employees........................................

• FY ‘12 Revenue(1)...............................

• FY ’12 EBITDA(1)(2)...........................

• 29 year history

• U.K.’s largest integrator of natural gas systems

• Additional Capabilities – Engineering ► automotive and manufacturing – Environmental ► stack emissions and marine – Specialty ► nuclear and blending

• Complementary product line – GasPTi and Iris

CORPORATE OVERVIEW

OPERATIONS OVERVIEW

1984

Stone, United Kingdom

Privately Held

86

£14.0 million

£2.4 million Cold Meece, Stone, Staffordshire

Manufacturing, design, quality control, R&D, sales, logistics, service, engineering

support (24/7)

HISTORICAL REVENUES £ in millions

Note: (1) Orbital’s fiscal year ended June 30, 2012 (2) EBITDA is Operating Profit – Continuing Operations, before depreciation

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Dynamic Base Business to Support Growth

CUI provides a variety of enabling technologies to customers across various industries, including energy, healthcare, med-tech, networking, and telecommunications

OEM product cycle and close customer relationships drive sales growth and product innovation – Multi-year product cycle enhances sales visibility

Industry Design Awards – Golden Mousetrap Award Finalist | EP Magazine “Product of the Year” | EDN’s “Hot 100 Products of 2012”

CUI CORE TECHNOLOGY

Power Supply Units

Motion Control

Components

PRODUCTS & APPLICATIONS

Products: External & embedded ac-dc power supplies, dc-dc converters, & LED drivers End use: Motorola wi-fi base stations; Slingbox

Products: Rotary encoders and other motion control devices End use: Diebold cash machines; D-Box home theater

Products: Connectors, buzzers, speakers, microphones, thermal components End use: Abbott insulin machines, XM satellite radio, Philips defibrillators

CUSTOMERS

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Disruptive Innovation and Value Proposition . . .

• Industry’s first “real-time” natural gas BTU measurement device – Measures and analyzes quality, volume

and other characteristics

• Addresses the nagging issue in natural gas production, transportation, storage, and use – “What am I buying?”

• Protected by more than 85 international patents – Own IP after selling 3,100 units

• Certified for installation in the EU,U.S., Asia, and Africa – CSA, Baseefa, ATEX, and EICEx

75% COST SAVINGS OVER 10 YEARS;

FASTER; MORE EFFICIENT; MORE ECONOMICAL

CUI SOLUTION CURRENT STANDARD VS Design

Implementation

Test Time

Space Required

Up-Front Cost

Maintenance

Down Time

Custom engineered system

Variable timing 5 week installation

12-40 minutes

Variable, but significant

> $200,000

Every 36 hours

14-16%

Single, prefabricated product

No design; 90 minute installation

5 seconds

None – sits on pipeline

$55,000

Annual

0%

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Disruptive Innovation and Value Proposition . . .

VS

Acquisition of Orbital – Highly Strategic Fit

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ORBITAL PROBE CUI ANALYZER COMBINED SOLUTION • $7,600 ASP • 40% Operating Margin

• $20,000 ASP • 48% Operating Margin

• $55,000 ASP • 45% Operating Margin

Gas Turbines(4)

– Global installed base of 46,000+ in 2009, expected to reach 57,000+ by 2018

– Annual maintenance cost of $18.3 billion in 2009 and expected to reach $25 billion by 2018

– Significant ROI for turbine owners – $1 billion opportunity

Other Large-Scale Applications – Other opportunities related to natural gas

exploration and production, transportation, storage, and use

– Marine shipping – Rail transportation – LNG heavy duty vehicles and trucks

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…with Enormous Market Opportunity and Potential

US Pipelines(1)

– 305,000 miles – 210 separate pipeline systems – 30,000+ monitoring sites – $600 million opportunity

European Pipelines(2)

– 221,000 miles and 20,000 miles under construction

– 20,000+ monitoring sites – $400 million opportunity

New pipeline construction(3)

– 119,000 miles under construction worldwide

– 15,000+ potential monitoring sites – $300 million opportunity

Note: (1) US Energy Information Administration (2) Natural Gas Systems of Europe, 2010 Edition (3) 2011 Worldwide Pipeline Construction Report (January 2011) (4) Gas Turbine World (November-December 2009)

TOTAL AVAILABLE MARKET (5)(6)

$1.5+ BILLION ANNUALLY BY 2015

TODAY’S OPPORTUNITY FUTURE OPPORTUNITIES

Note ctd.: (5) Global Industry Analysts, Inc. (6) Does not include Asia, Africa, Australia, South

America and numerous other potential geographic regions

*U.S. Energy Information Administration

**Natural Gas Systems of Europe, 2010 Edition

Go-Forward Growth Initiatives

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Novum ► Power Supply Management

• Emerging line of digital power modules that offer OEMs in the networking and telecommunications industries cost-saving programmable chips

• 3 products from this group have received industry recognition since November 2012

• Unsolicited Partnership with Ericsson Energy

Solus ► Power Supply Management

• Product family that enhances our Novum line by providing a more efficient power supply source that is scalable to serve numerous customer needs

GasPTi ► Natural Gas Measurement Device

• Innovative and potentially disruptive solution to a significant legacy issue that exists in natural gas BTU-related applications – real-time quality test and measurement

Iris ► Integrated Remote Information System

• Telemetry software solution that greatly enhances pipeline operators’ ability to remotely monitor, manage, control, and troubleshoot the tasks, procedures, and difficulties that arise

IRIS – Integrated Remote Information System

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IRIS – Integrated Remote Information System

Current “DOS” Based Technology

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IRIS – Integrated Remote Information System

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IRIS – Integrated Remote Information System

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IRIS – Integrated Remote Information System

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• 29 years experience • Domain expertise

– Environmental – Engineering – Specialty

• New product cycle – GasPTi and Iris

• Engineered solutions provider

• Recognized natural gas industry experts

• 24/7 engineering support • Long-term (5+ years)

contract portfolio – Steady income stream – Culture/history

of profitability

• Embedded relationships in natural gas industry

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Combined Company Operations Overview

• 24 years experience • 50,000+ unique customers • 50+ countries • New product cycle

– Novum and Solus

• Healthy back-log of $14.2 million

• Long-term customer relationships

• New distributor relationship – Future Electronics

• Industry design awards – Golden Mousetrap

Award Finalist

– EP Magazine “Product of the Year”

– Selection as EDN’s “Hot 100 Products of 2012”

• Global footprint

Management Team

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DANIEL FORD ► CFO • Mr. Ford has been the Company’s Chief Financial Officer

since 2008. During the past 5 years, Dan has implemented a number of directional changes, including advanced internal fixed asset tracking, real-time inventory, and ERP systems. Additionally, he was instrumental in financing the Company’s move to its current 62,400 square foot facility and facilitating the Company’s February 2012 capital raise.

• Mr. Ford has prior financial services experience, with KPMG and Andersen.

• Mr. Ford earned his B.B.A. in Finance and Accounting from the University of Portland in 2001 and his MBA from George Fox University in 2007.

ANDREW RIDGE ► Managing Director, Orbital

• Mr. Ridge has worked with Orbital for 20 years assisting in the company’s growth and reputation especially in the natural gas market. He is an Instrumentation and Process Engineer and has been responsible for the design and delivery of a number of key infrastructure critical projects for the UK natural gas transmission and distributions systems.

• He has been involved within the Industry in the production and development of International and other engineering standards for over 14 years. He has worked as a committee member in the production of various standards for BSI, ISO, and IGEM. Currently he represents the UK as the principle expert in the working group responsible for the re-write of ISO 10715.

WILLIAM CLOUGH ► President & CEO • Mr. Clough has been the Company’s President and

CEO since 2008. During his tenure, he has led several strategic initiatives, including the Company’s pending acquisition of Orbital Gas Systems Limited and the Company’s Vergence Technology Line, as well as the Company’s disposal of Comex Electronics. He also steered the Company through its February 2012 capital raise and eventual up-listing to Nasdaq.

• Mr. Clough is an attorney and operated a multi-office law firm for 14 years. Also, Bill is a former law enforcement officer and U.S. Air Marshall.

• Mr. Clough earned his Juris Doctorate, cum laude, from the University of California, Hastings College of Law in 1990.

MATTHEW MCKENZIE ► President, CUI, Inc. • Mr. McKenzie has been the President of CUI, Inc. since

2008. Matt has served in various capacities at CUI for more than 10 years, including as its President from 2008 to Present. He has intimate knowledge of the Company’s business, its operations, and its potential growth opportunities. Matt has positioned the Company for growth through sales and operational expansion, as well as channel partner development. Additionally, he facilitated ISO 9001 certification, implemented quality management and ERP systems, and improved global logistics structure. Matt spearheads research, development and implementation for our Novum® and Solus® lines.

Investment Highlights

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Specialized provider of power management, electronics, and test & measurement technologies to a variety of industries, including energy, healthcare, med-tech, networking, and telecommunications

Extensive reach—our products touch 50,000+ customers located in more than 50 countries, including large-scale OEMs and Fortune 500 companies such as GE, Honeywell, Intel, Kohler, Philips, and Microsoft

Strong revenue growth since 2008, representing an ~20% CAGR, and healthy back-log of $14.2 million as of December 31, 2012, up 50% year-on-year

New, disruptive product cycle based on a proven technology that addresses a universal legacy issue across the entire natural gas value chain

On April 18, 2013, acquired Orbital Gas Systems Limited, a provider of engineering services and customized process products and solutions for the natural gas industry, for £17 million

Acquisition is immediately accretive to FY ’12 earnings and margins on a “look-back” basis and forms a partnership that delivers a uniquely disruptive technology to address a pervasive issue in natural gas exploration & production, transportation, and usage

Accelerates opportunities for growth and greatly enhances the combined company’s international profile building an extremely defensible market position through first mover status and a comprehensive portfolio of IP

Highly experienced and driven management team that has implemented forward-looking growth strategies and initiatives

NASDAQ:CUI cuiglobal.com

William J. Clough, Esq President & CEO wclough@cuiglobal.com VOX: 503-612-2307 FAX: 503-612-2385 MOB: 925-989-6651

Daniel N. Ford CFO dford@cuiglobal.com VOX: 503-612-2319 FAX: 503-612-2385 MOB: 503-504-1137