Kaison Studiotechnik - German manufacturer of robust and cost-effective broadcast intercom systems. Professional Wireless Systems (PWS) - Sales, service, support and rentals of professional wireless audio equipment. Frequency coordination services, on-site repairs and wireless audio consultation services. ASL Intercom - Dutch manufacturer of intercom, Q-lights, and ancillary audio equipment. Riedel - German manufacturer and rental supplier of 2-way radio, party-line intercom, matrix intercom, digital audio, and digital audio network equipment. Tour Guide Solutions - Sales of Sennheiser wireless transmitter and receiver systems for company tours and language translation needs. CP Communications Inc. - U.S. Rental, Sales, and Service of Communications, Audio and RF equipment to the Entertainment, Broadcast, Theatre, Film, and Special Event Industry CTP Systems Limited - UK Manufacturers of broadcast television talkback systems, programme Sound and custom audio equipment. DELEC Audio- und Videotechnik GmbH - German manufacturer of broadcast intercom systems, with LCD display keys. RG Communications Inc. - Sound reinforcement, lighting systems, portable stages/roofs, paging systems and two-way radio for concerts, conventions, sports events, motor sport events, fairs, festivals and business meetings.