Features: Transform your traditional mountain bike into an efficient e bike with our motor kit, featuring the display and button controller for enhanced riding efficiency and ease on climbs and long rides. This kit includes a waterproof IP65 4 pin connector and durable ABS materials, ensuring reliable performances in various weather conditions while providing multiple assist modes for a customizable ride experience. For mountain biking enthusiasts, city commuters, outdoor adventurers, and leisure cyclists seeking improved riding performances and reduced physical exertion. Perfect for urban commuting, tackling rugged trails, weekends rides with friends or family, and fitness workouts, offering a versatile solution for diversing cycling needs. Enjoy real time monitoring of battery life, speed, and distance with the clear display, allowing you to stay informed and in control throughout your journey. Specifications: Material: Plastic Size: About. 170mm/6.69in Package Includes: 1pc 4Pin Bike Switch Button Controller note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.