The DWM-01/C31 digital handheld incorporates a newly developed uni-directional (supercardiod) condenser capsule and is ideally suited for vocal applications. The microphones frequency response is 60 Hz – 20 kHz with a maximum input level of 151 dBSPL. The DWM-01/C31 provides a choice of 1, 10 or 50 mW RF output. The transmitter operates for approximately five hours using two AA size alkaline batteries at 10 mW output power. Transmitter functions; including input attenuator, RF frequency selection, RF power output, Audio LCF frequency and a power sleep mode (in the transmitter) can be remotely controlled from the digital wireless receiver.