【Long-Lasting Battery】Our electric bike booster kit comes with a powerful18V/10AH battery, providing you with a long, enjoyable riding experience. With a range of up to 50 kilometers in medium assist mode, you can explore the city or countryside without worrying about running out of battery. 【Versatile Compatibility】Our power assist kit is designed to fit a variety of tire widths and seatpost sizes, making it compatible with a variety of bikes. Whether you have a mountain bike with tire widths from 1.5 to 2.15in or a road bike with tire sizes from 25C to 38C, our kits fit easily. Additionally, it supports seatpost diameters of 25.4, 27.2, 28.6, 30.4, 30.8 and 31.6mm, making it suitable for most bikes. 【Enjoyable Riding Experience】Our electric assist package features four different power assist modes, allowing you to choose the level of assistance that suits your needs. Whether you prefer gentle boost on long rides or more powerful boost on uphill climbs, our kit has what you need. Experience the joy of effortless riding with just the push of a button. 【Smart App Control】Take your riding experience to the next level with our dedicated app. Connect your phone to our electric bike booster kit and enjoy additional features like real-time battery level display, speed tracking, and custom power settings. Take control of your ride and make adjustments on the go. 【Easy Installation】No need for any special tools or professional help. Our electric assist kit installs easily in just 30 seconds, fitting securely between the rear wheel and seatpost. Easily convert your regular bike into an e-bike and enjoy the convenience of a power boost when you need it.