This receiver is designed for photographic studio and on-location work to trigger various flash lights. The FC-16 transmitter (sold separately) is attached on the hot shoe of the camera while the receiver is plugged into the studio flash. Each receiver works with one studio flash. 

Frequency: 2.4Ghz 

Operating Distance: up to 100m. 

16 Selectable Channels. 

1/4" Tripod Mount. 

Sync Speed: 1/250 second. 

Power Supply: 2x alkaline AAA batteries (NOT INCLUDED)