Multi-Function High-Speed Wireless Flash Trigger (H-550)

Main features:
1, Ultra high-sync speed
Ultra high-Sync speed can achieve high up to 1/8000s (equal to the highest camera shutter speed)

2, Flash groups controlling
Three flash groups controlling options (totally 7 different group combinations according to user's requirement).

3, TTL function
Support TTL function of Speedlights while being able to trigger off-camera flash.

4, Wireless RF
Utilize 2.4GHz RF and FSK Modulation technology which is much more stable; Wireless controlling range is up to 150m.

5, Basic triggering function
Wirelessly triggering Camera, Speedlight and studio or outdoor flashes. Sync speed is high up to 1/250s; Triggering frequency is high up to 20 frames/s.

6, Relay function
Wirelessly and Remotely control camera shutter while relaying signal to flashes to make camera and flashes synchronously work in the same time.

7, "Transmitter+Receiver" built-in one
The product can be used as either transmitter or receiver. One may order multiple H-550 used as receivers to control more than one flashes.

8, One camera control multiple cameras
By operating the master camera, other cameras can be triggered in the same time.

9, Waking up Speedlights:
Speedlight will go into sleep mode automatically while non-used for a period of time, H-550 can help to wake it up.

10, AAA batteries installed
Use AAA batteries with standby time high up to 200 hours.