CowboyStudio NPT-04 4 Channel Wireless Trigger for External Speelights with 1 Trigger and 2 Receivers (NPT-04+extra receiver)
4 channels to avoid interferenceThe receivers have an on/off switches, and an LED to indicate triggeringA standard ¼in screw mountChannel Selector outside the transmitter and the receiver4 channels with hot shoe connector for external flashesTransmitter Power: 23A 12V battery Receiver Power: 2 AAA Battery (Not included)Maximum Working Distance: 30m (open area, without interference)Max available in distance range: 30M (Open fields, no fraise)Operates on Frequency: 433MHzv Highest responding time up to 1/320sTriggering life: up to 20,000 timesTrigger can operate additional NPT-04 receivers (available in our store)Compatible models:Canon SpeedLite 580EX II, 580EX, 550EX, 540EZ, 520EZ, 430EX, 430EZ, 420EX, 420EZ, 380EX;Nikon SpeedLight SB-800, SB-28, SB-27, SB-26, SB-25, SB-24;Olympus FL-50R, FL-50, FL-36R, FL-36; Pentax AF-540 FGZ, AF-360 FGZ, AF-400 FT, AF-240 FT;Sigma EF-530 DG Super, EF-500 DG Super, EF-430;Sunpak Auto 2000DZ, 622 Pro, 433AF, 433D, 383, 355AFm 344D, 333D; Vivitar 285HV, DF-400MZ, DF-340MZ, 2700;Other flash models with a trigger voltage of 12V or lower.