Key benefits Durable construction for long lasting use. Made of durable material to withstand regular riding and frequent throttle use. Wide voltage compatibility. Supports 12V to 72V systems, allowing use with a wide range of electric bicycles. Easy installation. Designed to fit SM3Y+2Y controllers, providing a straightforward mounting process for users. Precise speed control. Thumb throttle enables accurate throttle response for smooth starts, steady acceleration, and better ride control. Practical and reliable input method. Ergonomic thumb control offers reliable performance and intuitive operation. Specifications and compatibility Type: electric bicycle thumb throttle Material: durable construction (made of durable material) Voltage range: 12V to 72V Controller compatibility: designed to support SM3Y+2Y controllers Use scenarios Daily city commuting. Use the thumb throttle to smoothly manage assist on varied urban terrain, improving comfort and control during stopandgo riding. Hill climbs and longer rides. The precise throttle response helps you manage speed on inclines, making climbs easier and safer. Converting a conventional bike to an electric assist ride. Install this throttle with SM3Y+2Y controllers to add controlled power assist to a non electric bicycle, enabling easier starts and better carrying capability. Notes For results, ensure compatibility with your bike's controller and electrical system before installation. This throttle is intended for use with SM3Y+2Y compatible setups and within the specified voltage range.