Specification:
Item type: Wireless Flash Trigger
Material: ABSModel: VC-818TX
Weight: Approx. 123g
Color: As picture shown
Exposure control system: E-TTL II/E-TTL automatic flash light, manual flash light, frequency flash light
Channels: 8 channels (1-8), 30 ID
Groups: Each channel independent controls 3 groups flash light (ABC)
Transmission distance: about 25 m effective trigger
Exposure Compensation Control (FEC): ± 3 stop in increments of 1/3
Flash surround exposure: ± 3 stop in increments of 1/3
Exposure Blocking: Yes
Maximum Synchronization Speed: Up to 1/8000s.
Manual Flash: power from 1/1 to 1/128 (1/3 EV increments)
Stroboscopic Flash: Up to 20 Flash / Up a 30 Hz Frequency
Auxiliary focusing function: has
USB firmware upgrade: has
Power supply: 2 x AA alkaline battery or NI-MH battery(not included)
Size: Approx. 90x56x40mm/3.5x2.2x1.6in Compatible camera: for Canon 450D/600D/700D/750D/800D/5D2/5D3/5D4/5DS/6D/6D2/7D/7D2/70D/80D/1D3/1D4/1DX camera.

Package List:
1 x Wireless Flash Trigger 1 x Instruction