Martel Electronics introduces the Pro 800 Mhz, 16-channel, wireless microphone system. The new Martel 800Mhz police transmitter with no lapel microphone has a 1,500-foot wireless range so full audio can be recorded even when the officer is in houses. The microphone is built into the audio transmitter so there is no more breaking lapel microphones or having to dress the cable under uniforms. With 16 channels, 16 officers cars can show up at one scene and everyone's audio can be recorded without interference.