The motor brushless controller set drives motor starts more smoothly and makes riding more comfortable. Features: Low noise,high efficiency,stable voltage. Dual mode controller can check the motor hall sensor condition automatically. If the motor sensors are broken,controller will operate to None-Hall mode. Display panel shows battery power,speed,gear level,distance,time,alarm,etc. Easy and simple to install and use,suitable for most electric bikes. Specification: Rated Power: 350W / 500W / 1000W (optional) Controller: 36V 18A / 36V 22A / 48V 28A Wire pipe(for internal panel): 6pcs / 9pcs / 12pcs Material: Aluminum alloy + Plastic Controller: (36V 18A)11*6.5*4cm / (36V 22A)15*8*5cm / (48V 28A)15*8*5cm Display panel: 11 * 6 cm / 4.3 * 2.4 in Package weight: approx. 1.5 kg / 3.3 lb Package List: 1* Brushless Controller 1* Display Panel NOTE: This e-bike controller and display panel are not suitable for scooters.