The Speedotron Radio Slave 1-Channel Transmitter provides a coded radio signal that works indoors, outdoors, around corners and through walls. A line-of-sight is not required between the transmitter and the receiver. The unit runs on 2 AAA batteries, which can last for up to 20,000 flashes.
Sensitivity up to 80 feet away.
Transmitter mounts directly to shoe mount or connects via sync cord.
Encoded transmission Test Button on transmitter.