Specification: Item Type: RC Boat Brushless ESC Material: Electronic Components Color: Black Continuous Current: 80A Bce Output: 5V/5A Operating Voltage: 7.4 to 22.2V Battery: 2 to 6S Lipo (Not Included) Application: RC Remote Control Boat, Underwater Propeller, Etc Product Size: Approx. 79 x 39mm / 3.11 x 1.54in ( Manual Measurement, Slight Error May Exist ) Package List:1 x RC Boat Brushless ESC Note:1. This device is designed with battery power supply and cannot use other types of power sources. Using other power sources may damage the device or the power source.2. This equipment is a remote control model product and cannot be used on a manned system to prevent accidents.3. This equipment is a high power electronic product, which will generate a lot of heat during operation. Please maintain forced air cooling conditions.4. The equipment is equipped with a power supply voltage detection system. When connecting with the battery, please use the shortest possible connecting wire, and ensure that the battery has enough current to prevent the voltage system from malfunctioning and affecting the use.5. This equipment is not allowed to drive two or more motors at the same time