The Electric Bike adopts Ultra Lightweight high-strength aluminum alloy frame, and packed with premiums comfort shock absorption. The powerful 250W rear hub drive motor activates and provides an extra level of assistance that you control with a thumb pad on the handlebar. There are 3 different levels of pedal-assist for you to choose from, which offer e-assistance up to 20 miles per hour. Depending on the level of assistance used, weight on the bike and path you take, the battery will last up to 25 miles and fully recharges in about 4-6 hours. Lets enjoy the outdoors and health benefits of bicycle riding. Ultra Lightweight Strong Body ---The E-Bike adopts 100% aluminum alloy frame, the front fork is made of high-strength carbon steel and packed with premiums comfort shock absorption. The Aluminum Alloy frame light, strong and designed to last, makes it easy to maneuver. Aluminum Alloy double-walled rims are for greater durability as well as faster ride with less drag. Brake & Gear Shift System ---With front and rear disc brakes and 21-speed transmission system, perfect brakes fully protect your safety.21-Speed gear increases hill-climbing power, further range variation, and greater terrain adaptability. 250W high speed brushless gear motors easily assists you to travel at the 15mph road speed limit. Lithium Battery & Easy Charge ---Equipped with the 36V 8AH removable lithium-Ion front battery, you can reach a range of up to 15-30 miles. Plenty for a days adventure or most trips to travel and back. Easy charge system need only 4-6 hours. Ergonomic Design ---Ergonomic hand bar, adjustable seat and RST, anti-slip and wear resistant. The light weight and efficient design help to travel further and save energy. And the LED handlebar display design let you can check the battery life, turn on the headlight, honk the horn, accelerate, brake all from the handlebars 3 Working Model -E-bike & Assisted bicycle & normal bicycle, you can choose the E-bike to enjoy a long time travel, and also exercise. Combining two modes would be a better choice.