Phottix PT-04 II Wireless Flash Remote Trigger + 2 Receivers

Product Information:
4 channels to avoid interference.
The receiver has an on/off switch, and an LED to indicate triggering.
The L-bracket is aluminium, and can be mounted in a hot shoe, or on a standard 1/4" screw mount.The locking knob allows the body of the receiver to be rotated relative to the L-bracket, and the indentations on the body allow it to be locked in the upright position, as well as 45 degrees forwards or backwards.

Specifications:
* 4 channels with hot shoe connector for external flashes
* Transmitter Power: 23A 12V battery
* Receiver Power: 2 AAA Battery
* Maximum Working Distance: 30m (open area, without interference)
* Operates on Frequency: 433MHz
* Highest responding time up to 1/1000s
* Standby time: one year
* Triggering life: up to 20,000 times