Sony WRT-820A / WRR-855
UHF Microphone / Single-Channel Diversity Sony Receiver
This unit is a camera mount design; can be mounted directly into compatible Sony camcorders & operated independently of batteries or cables. Can be used with many of Sony's Pro Camcorders without the need of a mounting adapter. The Sony CA-WR855 camera adapter is also supplied for use with other cameras.
Sony WRR-855 Receiver Specifications