This is a 36V 800W electric scooter and electric bicycle brush DC motor speed controller. Applicable motor: 48V 350W-500W brush motor. Controller wiring instructions: To operate, the motor must be connected to at least 4 joints. Simple and convenient installation; easy to use and operate. Suitable for electric tricycles, scooters, and similar vehicles. Condition: Item Type: Brush Motor Controller Model: YK31C Material: Aluminum Color: As shown in picture Size: Approx. 9 x 6.5 x 4 cm / 3.5 x 2.6 x 1.6 inches Rated Power: 800W Working Voltage: 36V Under Voltage: 31.5 ± 0.5V Shifter: 1-4V Brake Handle: Machine runs normally when engaged Applicable Motor: 48V 350W-500W brush motor Thread Configuration: - 48V 500W domestic: 4 head - 48V 500W export: 8 head Package List: 1 x Brush Motor Controller Note: Incorrect power cord connection may cause damage to the unit.