This product is made of fine materials light quality small burden after installation easy to install practical LED display is clear.Features:This display and controller adopt fine quality materials lightweight rainproof sturdy and practical.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 won'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 scooters.Specification:Type: 24V 36V 48V (optional)Material: plastics+metalPower: 250W / 350WSpeed model :(1:2:3) 33% 66% 100%Controller size: about 86 * 52 * 30mm / 3.4 * 2.0 * 1.2inDisplay size: 80 * 42 * 15mm / 3.1 * 1.7 * 0.6inItem weight: 300g / 10.6ouncePackage size: 200 * 50 * 80mm / 7.9 * 2.0 * 3.1inPackage weight: 308g / 10.9ounceNote: controller with power switch module (output battery voltage power can be connected to 50W)Package List:1 * LED Display1 * Controller