Support high voltage 5-9V receiver. 300W power relay. Transparent heat shrinkable tube help users see the working status of the LED clearly, appearance. Two LEDs indicate working status. Max DC30V 10A no signal protection With protection, easy to operate Input channels do not need to be calibrated, compatible with various of remote - Small size and light weight Application range: Remote control model launch Remote control model smoke control Weapon system control like real machine Model 's smoke control Control of various remote switch Switch the signals of two cameras Control the opening and closing of various electrical power sources, such as navigation lights, searchlights, strobe lights, buzzers, etc. Control the camera shutter or switch the camera's recording and camera mode. Colour:As shown Material:PC+Metal Package Contents: 2 x RC relay switch Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.