SmallRig Wireless Remote Controller for Select Sony / Canon / Nikon Cameras 3902 is designed for wireless control of camera shutter and recording. It easily triggers shutter and recording from a distance without causing any shake, thereby improving shooting. In STILL mode, press the button halfway for automatic focus and all the way down for taking pictures In MOVIE mode, do a full press to turn on/off recording. This item comes with a detachable cold shoe clamp at the bottom to quickly mount to a cold shoe mount or your collar. Remove the clamp and it can be locked to such accessories as Side Handle 3260, Top Handle 2165C, etc. via the 1/4"-20 screw in the box. Its silicone bottom helps prevent deflection, while the screw features an anti-lost design. Once paired with camera, it can automatically connect to your device for saving time. Besides, the Bluetooth connection works fast and reliably within a radius of 10 meters..