BestDealUSA 4 channe Wireless Remote FM Radio flash Speedlite Trigger w/ 2.5mm PC 2 receiver
Specification:    Operate frequency: 433MHZ    Sync speed: 1/250s    Work range: ≤30M    Screw mount on receiver: 1/4"    Battery for tramsmitter: 23A-12V mini batter (the battery included)    Batery for receiver: 2x1.5V AAA battery (the batteries not included)Suitable:    Canon SpeedLite 580EX II, 580EX, 550EX, 540EZ, 520EZ, 430EX, 430EZ, 420EX, 420EZ, 380EX;    Nikon SpeedLight SB-800, SB-600, SB-28, SB-27, SB-26, SB-25, SB-24;    Olympus FL-50, FL36;    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 (Older Vivitar 285/283 works only with PC sync);    Other flash models with a trigger voltage of 12V or lower;    Work with flash units using universal hot shoe like Nikon, Sigma, Olympus, Pentax (except Minolta SONY as they use a special hot shoe).    1x Transmitter (with built-in battery)    2x Receiver (AAA Batteries not included)    1x PC Sync cord for camera (2.5mm to Male)