YongNuo 4 Channel Wireless Flash Trigger PT-04 For

Specification: This Flash Transmitter is designed for Sony and Minolta Camera, it can be mounted into sony or minolta camera direclty but not use any adapter, it's very convenient. This Wireless Flash transmitter is suitable for 4-Channel Wireless Hot Shoe Flash Triggers, and it's designed for Vivitar 285HV, Sunpak 433, Sunpak 383, Olympus FL-36 and other flashes which comes with a trigger voltage lower than 12V and could not be triggered by V1 or V2 receivers. The transmitter also has a red LED that illuminates when a shot is taken, and it sends out radio signals indiscriminately (the devices aren't paired up or anything like that), so you can have as many receivers scattered around as you like. The transmitter power: Maximum 23A, 23Volt battery Working Distance: 30m (open area, without interference) Working Frequency: 433MH Compatible Camera: --Sony A100/200/300/350/700/900 --Minolta 5D/7D --Other camera which has the same hot shoe Compatible Flash: - Canon SpeedLite 580EX II, 580EX, 540EZ, 520EZ, 430EZ, 430EX, 420EX, 420EZ, 380EX - Nikon SpeedLite SB-900, SB-800, SB-600, SB-28, SB-27, SB-26, SB-25, SB-24 - Olympus FL-50, FL-40 - Pentax AF-540 FGZ, AF-360 FGZ, AF-400 FT, AF-240 FT - Sigma EF-500 DG Super, EF-500 DG ST, EF-430 - Sunpak Auto 2000DZ, 622 Pro, 433AF, 433D, 383, 355AFm 344D, 333D - Vivitar 285HV - Other flash models with a triger voltage of 12V or lower (not good for Nissin flash)