Undervoltage Protection: When the battery voltage drops to the undervoltage level of the DC motor speed controller, it automatically stops output to protect the battery from damage due to over-discharge. Fault Protection Function: Prevents unintended operation caused by controller power-on due to wiring or handlebar failure, enhancing vehicle safety. MOS Tube Short Circuit Protection: Automatically detects MOS tube faults at power-on to prevent chain short circuits and damage to other components. High Temperature Protection: When the motor brush controller temperature is too high, it automatically reduces output current or stops output. Stall Protection: When the motor stalls, the control circuit automatically limits current and cuts off the circuit within 2 seconds to protect the motor and controller. Specification: Material: Aluminum shell Power: 1000W Size: 9.4cm x 6.2cm x 3.1cm / 3.70inch x 2.44inch x 1.22inch Package Includes: 1 set motor brush controller Note: Please allow slight measurement deviations of 1-2cm due to manual measurement.