receiver board working input voltage:DC 3.6V-6VThis kit very good, it can control high power motor, it good for tank ,ship, car. we have make video.Notice:When the ship is remotely controlled, the remote control distance will be affected by the water level and the height difference of the water surface.Remote ControllerRC Boat Cars ControllerTransmitter Receiver6CH 2.4G Transmitter ReceiverRC Boat Transmitter Receivercolour:blackMaterial:plasticSize:Receiving board size: 4.5cmx4cmx0.9cmPackage Contents:1* remote control (without battery)1* receiving board4 *output cables1 *screwdriverOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.