Neewer 16 Channel Wireless Remote FM Flash Speedlite Radio Trigger for Flash

Neewer 16 Channel Wireless Remote FM Flash Speedlite Radio Trigger for Flash New in original box Specification: Operate frequency: 433MHZ Sync speed: 1/250s Work range: ≤30M Screw mount on receiver: 1/4" Battery for tramsmitter: 23A-12V mini battery Batery for receiver: 2x1.5V AAA battery (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). Package Contents: 1x Transmitter (with built-in battery) 2x Receiver (AAA Batteries not included) 1x PC Sync cord for camera (2.5mm to Male)