The controller is a sine wave three-mode controller, matched with a Hall and no Hall brushless motor, with self-learning function Suitable for 24V500W 24V750W, 36V500W 36V750W, 48V500W 48V750W with Hall without Hall brushless motor Made of premium metal and plastic, which is sturdy and durable with long service life. High Performance:features more stable and efficient with lower current consumption. The brushless controller features silent working and to the state of electric bike. Stable in performance and in reliability. Easy to install and use. You can rotate the voltage value in real time to determine the remaining charge accurately. Colour:black :Plastic + Metal type:S900 Package Contents: 1 x Controller 1 x LCD Display 1 x Thumb Throttle 1 x sensor 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.