Cordless Microphones
From The RadioReference Wiki
Cordless microphones or "wireless microphones" can be found transmitting throughout the RF spectrum, most often in the 70-74 MHz, 170-220 MHz, and 580-800 MHz ranges. Many modern professional wireless microphone systems are frequency agile - that is, tuneable to different frequencies - to find clear channels and avoid interference, with most operating within unused television channels.
Wireless microphone transmit power levels are normally very low, to reduce the potential for interference. Reception thus requires close proximity or use of directional antennas.
A good overview of wireless microphone systems can be found on the Shure website at http://www.shure.com/booklets/intro/intro_to_wireless.asp
Common frequencies
Entertainment and religious events (limited to 50 milliwatts)
169.445 169.505 170.245 170.245 170.305 171.045 171.105 171.845 171.905
COMTEK Wireless Microphones
72.1000 ch A 72.3000 ch B 72.5000 ch C 72.7000 ch D 72.9000 ch E 73.1000 ch N 73.3000 ch M 73.6000 ch K 75.1000 ch L 75.5000 ch F 75.7000 ch G 75.9000 ch H 82.5000 ch 6-1 82.8000 ch 6-3 83.8000 ch 6-2 86.8000 ch 6-5 174.8000 ch 7-2 175.2500 ch 7-4 175.6000 ch 7-6 176.4000 ch 7-10 178.2000 ch 7-18 178.6000 ch 7-20 179.2000 ch 7-23 180.8000 ch 8-2 181.2500 ch 8-4 181.6000 ch 8-6 182.4000 ch 8-10 183.2000 ch 8-13 183.4000 ch 8-14 ??? ch 8-16 184.2000 ch 8-18 184.6000 ch 8-20 184.8000 ch 8-21 185.2000 ch 8-23 186.8000 ch 9-2 187.6000 ch 9-6 188.4000 ch 9-10 190.2000 ch 9-18 192.8000 ch 10-2 193.2000 ch 10-4 193.6000 ch 10-6 194.4000 ch 10-10 195.2000 ch 10-13 195.4000 ch 10-14 195.8000 ch 10-16 196.2000 ch 10-18 196.6000 ch 10-20 197.4000 ch 10-24 198.7500 ch 11-2 199.6000 ch 11-6 200.4000 ch 11-10 202.2000 ch 11-18 202.6500 ch 11-20 204.8000 ch 12-2 205.6000 ch 12-6 206.4000 ch 12-10 208.2000 ch 12-18 208.6500 ch 12-20 210.8000 ch 13-2 211.6000 ch 13-6 212.4000 ch 13-10
Manufacturer links
Frequency lists for many models of wireless microphones can be found on the manufacturer's websites. Some manufacturers may just sell a rebadged model made by someone else. A partial list of manufacturers includes: