High quality Plastic material: plastic shell, fine workmanship, good toughness, good waterproof performance, better protection for the internal circuit, more durable. LED Display Panel: This LED display has buttons and is easy to use, smart power display, real battery power, real-time recording of power consumption, up to mileage. Made of high quality material, durable Transmission memory function: High, medium and low simulated thrust comes from manual transmission and gear position indicator, with gear position memory function, which can automatically adjust the gear position status when the power is cut off. Wide Application: Compatible with 36V, suitable for 22.2mm handlebars, perfect accessories for electric bicycles, etc., suitable for controller electric bicycle motor kit. Colour: Black Material: plastic Type: 36V Package Contents: 1 x speed computer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.