Pairs with BLX4, BLX4R or BLX88 receivers (receiver not included, but required to operate; this is a component, not a full system).
For this wireless system component to work, please make sure your transmitter and receiver (not included) match in frequency range (style).
Power and battery status LED. Adjustable gain control.
Quick & easy frequency matching. 300 feet (91 m) operating range (line of sight).
2 AA batteries (included) provide up to 14 hours of continuous use. Receiver and transmitter must be in the same frequency.