Descriptions 
Seagull SYK-3 Flash Slave Trigger Wireless Hot Shoe Sync Adapter for hot shoe mount flash, compact and sturdy with a standard hot shoe seat on the top and a standard 1/4"- 20 thread screw socket for tripod on the bottom. 
This flash remote controller is optical theory making the master flasher to control remotely the auxiliary one to flash synchronously without the need of connecting wires. Because slave trigger gets its working power from the flash attached to it and therefore it is battery-free. The item features small in volume, good-looking in exterior, high in flexibility and stable in performance.
Triggered by external flash light. No battery required. Suitable for Nikon, Canon, Olympus, Pentax, Sunpak, Sigma, Nissin, Metz, etc. flashes that use standard ISO shoe. Trigger by another flash light from other source. Features - Small, portable, high in flexibility
- Flash synchronously without the need of connecting wires
- Suitable for ALL flash of Camera
How to use? 
- ON and set your External Flash to Auto Mode.
- Mount your external flash to the "Flash Slave Trigger Wireless Hot Shoe Sync Adapter".
- Put the "Flash Slave Trigger Wireless Hot Shoe Sync Adapter" together with your flashed mounted on it on a tripod or anywhere apart from your camera.
- Pop up the built in flash of your camera.
- Take a shot with your built in flash fired.
- External flash will fire/trigger by the "Flash Slave Trigger Wireless Hot Shoe Sync Adapter".
Warranty - One Month ShaShinKi.com Warranty
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