1000W PEAK POWERFUL MOTOR: OUXI electric bike is equipped with 1000W high speed brushless motor, the upgraded model provides stronger electric power with speed reaching up to 31MPH. Providing strong power and climbing capabilities for the electric bicycle REMOVABLE LARGER BATTERY: The e bike comes with dual 48V 15AH larger battery which makes longer using lifetime. It also offers electric bike for adults longer riding range and assists traveling up to 37 miles with per full charge. Removable battery makes it easy to charge, 7-8 hours fully charged 3 WORKING MODES: Pure electric mode, pedal-assist mode, and pedal modes. Whether it’s shortening your commute to work on weekdays, or exploring new trails outdoors on weekends while exercising and relaxing, this electric bicycle is a great choice LCD DISPLAY & EASY RIDING: The large M5 LCD display electric bike's speed, battery level, odometer and more. You can easily see the status of mountain electric bicycle, making your riding more convenient and easy SAFETY FIRST: The electric bike has passed the strict certification of UL2849. Dual disc brakes ensure all-weather braking ability, and front and rear lights improve visibility during daytime and nighttime riding 85% ASSEMBLY& CUSTOMER SERVICE: OUXI ebikes for adults come 85% pre-assembled. You need to do is install the front wheel, light, rear seat, handlebars and tire inflation and you are ready to hit the road. Tip: Check out the detailed installation video on the linked details page. If you have any problems with the moped style ebike or your order, please contact us, we have professional technicians to solve the problem for you OUXI V8 Max Electric Bike Adults, Electric Mountain Bike with Dual 48V 15Ah Removable Larger Battery, 1000W Motor Adult Electric Bicycles, 20''x 4.0 Fat Tire E Bike 7-Speed, Hydraulic Brake, Black