Features: Consists of a signal sender and a receiver trigger and works by means of the frequency modulation wireless remote control.Adopts the advanced circuit and componentsCan transmit the coded FM wireless signaLow power consumptionCan work under the standby mode for more than one year with only one batterycontinuously trigger for thirty thousand times.Applicable to the traditional or digital camera with hot shoe or PC controlling interface.Adopts dry battery for power supply, which is safe, energy-saving, and convenient. The product adopts micro-computer for controlling the decoding, Which has superior anti-interference capability; sensitive reaction speedSpecifications:Model: PT-04 GYOutdoor Synchronous Speed (open area): Max 1/500secIndoor Synchronous Speed: Max 1/250secOutdoor operating distance (open area): >30MReceiver: Supply by 2 x AAA batteries (NOT INCLUDED)battery inside: 12V 23AIndoor operating distance: >10Mtrigger current: 0.01MAColor: blackSync cord: 2.5mmCamera Size: 105 x 30 x 42mmNet weight: 148.8gPackage Included:1 x 4 Channels Transmitter 3 x PT-04GY Receiver 1 x PC Sync cord for camera