HandsfreeUSA
- Provider of earpieces, headsets, throat microphones, tactical headsets, surveillance kits, and shoulder microphones for two-way radio.
- http://www.handsfreeusa.com

Kaotek Electronic Co., Ltd.
- Manufacturer of microphones, amplifiers, and security system.
- http://kaotek.com.tw/

Klein Electronics Inc.
- Provides headsets and other accessories for two-way radio equipment.
- http://www.headsetusa.com/

OTTO Communications
- Design and manufacture noise-attenuating and lightweight headsets, earphones and remote speaker microphones . Includes a product selection and pricing guide.
- http://www.ottoeng.com/comm/

Setcom Corporation
- Manufactures a range of headsets, police motorcycle and bicycle helmet kits, intercom and radio mixing systems for use in fire apparatus, locomotives and other mobile vehicles.
- http://www.setcomcorp.com/

McKay Products USA
- Supplier of two-way radio earphones, headsets, microphones, PTT, and bone conduction sets.
- http://www.mckayproducts.com

PCL Communications
- Maker of the coiled behind-the-ear listening earpieces. Designed for surveillance, tactical, police and security applications.
- http://pclcommunications.com

Dowumi Corporation
- Manufacture bone conduction headsets for telemarketing, call centers, internet phones, and emergency service operations. Offers an explanation of bone conduction.
- http://www.dowumi.com/

Western Mobile Telephone Company
- Manufacture a hands-free undercover microphone system used with law enforcement two-way radios.
- http://www.911radio.com/

Telex Communications, Inc.
- Market, design and manufacture audio, wireless and multimedia communications products. Products include speakers, amplifiers, mixers, consoles, signal processors and microphones .
- http://www.telex.com/

RadioMate Corporation
- Manufacture radio communication and telephone headsets and audio accessories . Includes product overviews and pricing .
- http://www.radiomate.com/

Plantronics, Inc.
- Design, manufacture and market lightweight communications headset products. Offers a facility to buy online . Includes product features, technical articles and a where to buy section .
- http://www.plantronics.com/

J&M Corporation
- Manufacture helmet headsets and hook-up cables for motor cyclists. Product descriptions and photographs, pricing and facilities to purchase online.
- http://www.jmcorp.com/

Porta Phone
- Manufacturer of football communication headsets and radios.
- http://www.portaphone.com/

Legion RF
- Manufacturer of microphones and other accessories for handheld radios.
- http://www.legion-rf.com.tw/

DTC Communications Inc.
- Manufacture earpieces and microphones for two-way radio . Product specifications and applications.
- http://www.dtccom.com/

Comtronics Inc.
- Manufactures and distributes custom and wired headsets and intercoms for industrial use. Offers a range of technical manuals and data sheets available for download in PDF format.
- http://www.comtronicsindustrial.com/

David Clark Company Incorporated
- Manufacture noise attenuating headsets and adapters for use with two-way radios. Products selectable by radio manufacturer.
- http://www.davidclark.com/

CeoTronics AG
- Manufacture a range of headsets with integrated UHF 2-way-radio for a range of applications. Includes a downloadable brochure in pdf format .
- http://www.ceotronics.com/