Square Perfect's 4 Channel Wireless trigger will fire your power pack and/or strobe from 50 feet away. Talk about distance. With a sensitivity range of up to 50 feet, the Square Perfect Radio Solution provides a coded radio signal that works indoors, outdoors, around corners and through walls. Designed to trigger a flash remotely, a line of sight is not required between the Transmitter and Receiver. It works with nearly any camera that has a hot shoe or X-sync terminal. Quality. This set-up is made from CE approved electronic components and has a full 1 year warranty. NOTE: It is not compatible with H-prong connections. FEATURES: Can be operated by your camera hotshoe or the included sync cord. 4 Channels with no interference. Automatic Channel Search. Includes one 3.5mm to 6.35mm adapter. Includes one 3.5mm to 2.5mm adapter. Micro-computer controlled. Triggering delay is 1/1600 second. Has two channels and works without interference with each other. Receiver has the led indication. Long life battery. Batteries Required: 2 AAA. Battery Life: Greater than 1200 Hours. Triggering Delay: 1/1600s. Remote Distance: 50 Feet. Working Indication: LED. WHAT IS INCLUDED? Transmitter. Receiver. (1) 3.5mm to 6.35mm adapter. (1) 3.5mm to 2.5mm adapter.