Precautions for use: 1. This device is designed with batteries as energy sources, and cannot use other types of power sources. If you use other power sources, it may damage the device or the power source. It is recommended to use standard batteries corresponding to A-number ESCs. The battery voltage cannot be too low, otherwise it will automatically cut off the power. 2. This device is a remote control model product and cannot be used on a manned system to prevent accidents. 3. This device is a high-power electronic product, which will generate a lot of heat in the work, please pay attention to maintain the forced air cooling condition. 4. The device is equipped with a power supply voltage detection system. When connecting to the battery, please use the shortest possible connection line and ensure that there is a battery with sufficient current. In order to avoid erroneous operation of the voltage system and affect the use. 5. This device is not allowed to drive two or more motors at the same time to avoid misoperation. 6. Need to use standard remote control, otherwise it may cause the automatic recognition of the neutral position of the throttle is not good, affecting the function. 7. Need to use standard internal and external rotation motors, otherwise it may cause incompatibility and affect function. 8. This equipment is a special water-cooled ESC for ships. It is required to be placed in the sealed box of the ship. But it can't be soaked in water. If you need to soak in water, customers need to add waterproof rubber seal. If it is incompatible for other purposes, it is not a quality problem of the device itself