Usage Tips:This display and controller adopt good quality materials, , rainproof, sturdy and durable. LED display can clearly show the battery capacity, several buttons for quick operation of speed adjustment and headlight, easy to use. The controller is brushless type, working silently and stably, 't suddenly accelerate or decrease the speed to keep you safe. With a mount on the back of LED display for easy installation, suitable for most handlebars. Suitable for electric bicycles, cars, . : 36V Power: 250W/350W Automatic: 6KM/H (press the MODE button) Speed Mode: 40 percent 70 percent 100 percent Material: Composite materials colour: blackandsilver Package Contents: 1 x LED Display 1 x Controller 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.