Receiver board working input voltage: DC 3.6V-6V kit is very , it can control high power motor, it is for tank, boat, car. we have made video. Note: When the ship is controlled remotely, the remote control distance will be affected by the level of and the height difference of the ship. Remote Control RC Boat Cars Controller Transmitter Receiver 6CH 2.4G Transmitter Receiver RC Boat Transmitter Receiver color: black Material: plastic Size: Receiver board size: 4.5cm x 4cm x 0.9cm Package Contents: 2 x Remote Control (without battery) 2 x Receiver Board 8 x Output Cables 2 x Screwdriver Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3 cm.