The Sony DWT-B01 Digital Wireless Bodypack
Transmitter is intended for use with Sony lavalier microphones such as
the ECM-77BC/9x and features digital audio processing for lower noise
and longer, efficient range. Up to three selectable output power
settings are provided for maximum results and improved battery
efficiency.
Two AA alkaline batteries power the DWT-B01 for up to
10 hours at the 10mW power setting. Additional features include an
input attenuator, RF frequency selection, RF power output, Audio LCF
frequency and a power sleep mode (in the transmitter) that can be
remotely controlled from the DWR-S01D digital wireless receiver.