The remote control is used in conjunction with the receiver board. The wireless transmission signal is strong, and the distance between the remote control and the receiving board should be 20cm when using it. Otherwise, if the distance is too close, it reach saturation due to the strong wireless signal, and the remote control and receiving board cannot be connected The recommended battery is a 7.4V rechargeable battery, and the recommended motor is a 390 motor. It is not allowed to use a 775 large current motor. Two motors are the same specification, and the current cannot exceed 10A If a high-voltage high rate battery (such as 12V) is used and drives a high-speed and high-power motor (with a load current 8A), it is easy to burn out the receiving board due to excessive power The receiving board is equipped with a built-in compass chip. Please install it according to the direction indicated on the back of the receiving board, so that the ship can automatically travel in a straight line Specification for remote controller: 1.54inch colored screen display Silicone buttons,and clear button functions Built-in rechargeable battery 1500mah Type-C charging port Long term endurance of 18 hours Easy selection of 24 fishing points Distance, power, signal, direction, and status feedback display Specification for receiver board: Adapted battery: 6V,7.2V,7.4V,11.1V,12V lipo battery(Do not use dry battery,as their poor current output capacity can cause the motor to fail to start) Adapted motor:380 390 motor Max output current:10A Motor interface:single way rated current 10A, current 20A LED light interface:directly connected to the LED light, the circuit board has already connected a 200ohm resistor internally Communication method:bidirectional communic, power, distance, voltage, wireless signal, GPS signal, status information bidirectional transmission Control distance:500meters Remote controller power consumption:80mA Receiver power consumption:130mA (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:plastic Package Contents: 1 * remote controller 1 * Board With GPS Only the above package content, other products are not included. Note: Light reflection 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.