PT-04S1 4-Channel Speedlite Radio Trigger
Model: PT-04S1 - Transmitting frequency: 433MHz - Channel number: 4 - Working range: up to 30 meters - Sync speed: 1/250 second - Transmitter powered by 1 x 23A/12V battery (included) - Receiver powered by 2 x AAA (not included) - Comes with sync cable and Chinese manual - Compatible with SONY & MINOLTA Brand and ALL other Manufactures SONY compatible flash units with hotshoe