【𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 𝐒𝐚𝐟𝐞𝐭𝐲 𝐚𝐧𝐝 𝐐𝐮𝐚𝐥𝐢𝐭𝐲】: Vivi M026TGB is SGS certified to UL2849 (Certificate Number: SGSNA/24/SZ/00143). 【𝐅𝐨𝐥𝐝𝐚𝐛𝐥𝐞 𝐀𝐥𝐮𝐦𝐢𝐧𝐮𝐦 𝐅𝐫𝐚𝐦𝐞】: The Vivi folding electric mountain bike features stronger aluminum frame than carbon steel and less prone to breakage. It can quickly fold up for easy storage in your car trunk or at home. It's easy to carry, so you can start your ride anytime. The folding electric bike is equipped with adjustable seats, handlebars, and removable batteries, it fits riders of different heights and weights, ensuring a comfortable experience 【𝐏𝐫𝐨𝐟𝐞𝐬𝐬𝐢𝐨𝐧𝐚𝐥 𝟐𝟏-𝐒𝐩𝐞𝐞𝐝 𝐒𝐲𝐬𝐭𝐞𝐦】: The mechanical front and rear disc brakes offer reliable stopping power and safety. The 21-speed transmission system gives you a variety of speed options. Plus, the bike comes with a shock-absorbing front fork and high-quality rear shock absorber, making for a smoother ride on hills, downhill, and rough roads. It's perfect for mountain biking, city cycling, and commuting 【𝐏𝐨𝐰𝐞𝐫𝐟𝐮𝐥 𝐏𝐞𝐚𝐤 𝟕𝟓𝟎𝐖 𝐌𝐨𝐭𝐨𝐫】: The Vivi electric bike for adults is equipped with a Peak 750W high-speed brushless motor, which has a longer lifespan and quicker startup. The removable battery features an energy-saving system for longer battery life. A 4-6 hour charge is enough for your daily commute or a full day of mountain biking 【𝐓𝐡𝐫𝐞𝐞 𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐌𝐨𝐝𝐞𝐬】: The E-bike, Assisted bicycle, and Normal bike modes offer flexibility for different needs. With the LCD smart display, you can get a range of 44-50 miles in pedal-assist mode or 22-25 miles using throttle only. Choose the E-bike mode for long trips or the bicycle mode for exercise. Combining all three modes might be the best choice 【𝐓𝐡𝐨𝐮𝐠𝐡𝐭𝐟𝐮𝐥 𝐒𝐞𝐫𝐯𝐢𝐜𝐞】: The Vivi adult electric bike comes 90% assembled, and it's easy to finish the assembly yourself. The motor, battery, controller, and dashboard are covered by a 1-year guarantee. We also include front and rear fenders for free, so you don't have to worry about using it in different conditions. Feel free to contact us if you have any issues