Usage Tips:7.4V 12V Underwater Thruster Built-in Motor Engine for RC Fishing Bait Boat Waterproof Propulsor Left Thruster:Push forward when the motor power line is reverse connected The red wire connects to the negative pole of the power supply and the black wire connects to the positive pole Right Thruster:Push forward when the motor power line is positive connected The red wire connects to the positive pole of the power supply and the black wire connects to the negative pole TipsThe power line of this motor has been welded the left motor pushes forward when using CCW propeller the Right motor pushes forward when using CW propeller Specification: Item name: Underwater Thruster Built-in Motor Motor Shaft Length25mm Tips: Due to manual measurement, please allow a slight deviation. Rotating speed: approx. 12000 rpm Voltage: 7.4V (Battery charging voltage 8.4V, discharging voltage 7.4V) Large thruster maximum voltage can be used up to 12V Features High speed and great horsepower. Perfect forremote control bait boat toy. Package included 1pc x Thruster