Cowboystudio SPT-04, 4 Channel Wireless Hot Shoe Flash Receiver for Sony A330L, A230L, A100K SLR Camera, Sony flash
Includes:1 x Receiver (Powered by 2 x AAA, Battery is not included)4 channels with hot shoe connector for external flashesReceiver Power: 2 AAA Battery (Not included)Maximum Working Distance: 30m (open area, without interference)Operates on Frequency: 433MHzHighest responding time up to 1/320sTriggering life: up to 20,000 times