Built-in Removable Battery E-Bike with 3+1 Riding Modes - The electric bike's built-in battery is to ensure reliable performance and long battery life. The battery life is extended by 20% compared to ordinary batteries, offering a range of up to 40 miles with a 36V battery. Carbon Steel Ebike Frame: The electric bike frame uses advanced Carbon Steel tube welding technology, providing advantages over ordinary frames, including no rust, no breakage, corrosion resistance, and lightweight construction. Its service life is 1.2 times longer than that of a typical frame. 0.2" Wider Tires Bike: The electric bike comes with 26" x 2.1" tires, which offer better comfort, stability, and grip compared to standard 1.95" tires, making it suitable for driving on slippery surfaces such as mud and sand. Unleashing Boundless Energy: The electric bike for adults features a Peak 750W motor, capable of reaching speeds up to 22MPH, which contributes to longer battery life and potentially extends the overall lifespan of the bike. Adaptable Step-Over City E-bike: The adjustable seat accommodates riders with heights ranging from 5'4" to 6'5",comes with almost 85% assembled, instructions and tools . Crafted from durable Carbon Steel alloy, it supports up to 350lbs and includes a one-year warran for added peace of mind.