The standard camera-mount receiver for any "PRO" series transmitter, the WR-PRO is a single channel receiver, but has two selectable operating frequencies to choose from (169.445MHz and 170.245MHz) giving the user an option in case one channel has interference. Comes with camera shoe mount and a 3.5mm mono to stereo microphone output cable. Features: Single channel, VHF receiver w/ 2 operating frequencies Works seamlessly with your DSLR camera Compatible with all PRO Series transmitters High gain...