Features: Made of good materials with fine craftsmanship, which ensures good toughness and waterproof feature, which provides better protection for inner circuit and makes it more durable. It allows you to easily have a look at the basic state of electric bike about speed, gear, power, mode, lamp, etc. With backlit, the data is clear in night or dark environment. Uses brushless motor controller, stable and silent, sensitive to the working state of bike. Very practical accessories kit to modify your electric bike and scooter. Suitable for lead-acid battery, lithium iron, ternary lithium battery, etc. Perfect for electric bike, scooter, etc. Easy to install and use. Specification: Condition: 100% Brand New Material: Metal + Plastic Voltage: 24V Power: 350W Display Type: LCD Size: as picture shown Suitable for handlebar diameter: 22.5mm Suitable for lead-acid battery, lithium iron, ternary lithium battery, etc Packing List: 1 x Controller 1 x Display