Replacing the Azden 30HT transmitter, the Azden 35HT UHF transmitter features a handheld microphone perfect for vocal applications. The 35HT is designed to work with either the 310UDR, 305UPR or 325UPR Azden 188-channel UHF receivers. The 35HT transmitter features 188 frequencies to digitally choose from, so you'll always find a clear channel. This camera-mount wireless microphone system uses UHF frequencies 566.125-589.875MHz to avoid interference from HDTV broadcast transmission. The Azden 35HT is powered by a pair of AA batteries