Transmitter uses AAA batteries Frequency: 2.4G FSK radio signal Transmitter Distance: 120 meters (open areas) Channel: 16 different channels Sync-speed: 1/250 sec Continuous-shot Frequency: 8 fps Power Supply: - Transmitter: 2 x 1.5V AAA battery - Receiver: 2 x 1.5V AAA battery Dimensions: - Transmitter: 76mm x 33mm x 27mm - Receiver: 71mm x 38mm x 32mm What"s In The Box: 1 x Transmitter 1 x Receiver 1 x Studio Strobe Sync Cable 1 x PC Sync Cable 1 x 1/8" to 1/4" Jack 1 x User Manual ePathDirect After Service: 30 Days Money Back Guarantee, 12 Months Warranty!