Wireless Flash Trigger Kit, 4-Channels with 1 Reciever Fires any photographic flash unit from any camera that has a hot shoe or pc outlet. The transmitter has a hot-shoe and an outlet for sync cords and the receiver has a pc outlet and a mono (6.3mm) sync jack for studio flash units. A separate standard pc sync cable is also included for the transmitter for cameras that do not have a hot shoe contack. The transmitter runs on a 12 volt replaceable battery, (included) good for 20,000 triggerings. The receiver uses 2-AA batteries, (not included) good for 30,000 triggerings. Standby mode reduces battery usage. Encoded wireless signal provides maximum protection from other radio frequency interference. Additional receivers are available.