ITEM NAME:4CH Wireless Remote Flash Speedlite Trigger Studio Flash for Nikon Camera Description: Durable,long lifespan, stable working. Multi channels for choosing, 4 channels meet the demand of different indoor environment. International standard universal ÃŽ ¦6.35 and ÃŽ ¦3.5 plugs, can trigger all studio flash and outdoor flash lights. Ball shaped emitter contact design which perfectly protect camera. Adopt AC100-240V power supply, ultra-low-voltage DC trigger, low power consumption and high efficiency. Adapt to various complex indoor environments, long range triggering radius 25m. Suitable for indoor 360 degree professional photography, play a main role in remote controlling studio sync flash. Specification: 4 channels with hot shoe connector for external flashes Transmitter Power: 23A 12V battery Receiver Power: 110-220V AC power Maximum Working Distance: 30m (open area, without interference) Operates on Frequency: 433MHz Highest responding time up to 1/320s Standby time: one year Triggering life: up to 20,000 times How to use: Make sure the channel selector of both transmitter and receiver at same position Insert the receiver's trigger output plug into your flash's jack Press the test button on your transmitter. The studio light should now flash Insert the transmitter's hot shoe socket into your camera's hot shoe jack (if your camera does not have a hot shoe use a PC sync cord and insert into the socket) You should now be ready to start shooting Package Includes: 1Piece x Transmitter ï ¼Ë† 12V 23A battery not includedï ¼â€° 1Piece x Receiver 1Piecex Sync Wire Cable 1Piece x 6.35mm Output Socket.International standard universal ÃŽ ¦6.35 and ÃŽ ¦3.5 plugs, can trigger all studio flash and outdoor flash lights. Insert the receiver's trigger output plug into your flash's jack. Press the test button on your transmitter.