This is a 36V 800W electric scooter and electric bicycle brush DC motor speed controller. Suitable for 36V 350W-500W brushed motors. The controller requires at least 4 wire connections for proper operation. Simple and easy to install, use, and operate. Ideal for electric tricycles, scooters, and similar electric 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 Throttle: 1-4V Brake Handle: System operates normally when not engaged Applicable Motor: 36V 350W-500W Brushed Motor Compatible With: Electric tricycles, scooters, and other electric bicycles Package List: 1 x Brush Motor Controller Note: Incorrect power cord connection may cause damage to the controller.