The ZTW Black Widow series offers a range of brushless motors with integrated ESC for easy setup and installation, ensuring compatibility between the motor and ESC. The BW3508 680KV motor is an ideal choice for 500-700 size multirotors powered by 4S LiPo batteries. With low internal resistance and fast response time, this motor provides excellent performance. The motors are pre-set as either CW or CCW at the factory, but the rotation direction can be easily changed using a switch on the side of the motor, as shown in the product photos above. Each motor comes with both CW and CCW propeller adapters, as well as a carbon fiber propeller mount and screw set. The motor with wires weighs approximately 135 grams.