Gyro Driving Straight Remote Controller for DIY Modified Control: 1 Set RC Bait Boat Transmitter Receiver Kit Cruise Control System 500 meters A pair of positive and negative propellers must be used, and the bait bin must be controlled by the servo. Before you buy, read! 1. Other manufacturers are unable to match the motherboard or remote control. The nest boat must be bought as a set if it is repaired. 2. There is a strong wireless transmission signal. When in use, the distance between the control board and the remote control should be more than 20 cm. If it is too close, the wireless signal will be saturated and the control board and remote control will not be able to connect. 3. This item only comes with