? Features This wireless remote shutter release cord is equipped with time-lapse shooting function Supports auto-focus， wireless bulb shutter， single and continuous shooting function (Corresponding function setting is required for camera) The receiver has manual control function and can be used as a wired shutter release Compatible with Sony DSLR a900， a850， a700， a550， a500， a350， a450， a400， a300， a200， a100， suitable for all cameras that compatible with Sony RM-S1RM shutter release cord General Specs Brand & Model Godox MC-S1R Type Wireless remote shutter release cord Emitter Power 2×1.5V/AAA batteries Battery Life Standby: Over 800 hours Channel Number 16 Operation Distance 100 meters in open space Indicator Dual-color LED indicator Compatibility Sony DSLR a900， a850， a700， a550， a500， a350， a450， a400， a300， a200， a100