TST Mountain E-Bike – Max Speed 20MPH, 750W Peak 1500W Motor, 120-Mile Range, 48V/15Ah Battery, APP-Controlled Riding, Suit for ages 14-55 with with UL2849 Certification. Disclaimer：consumers who purchase this product are responsible for understanding and complying with all state and local regulations related to its use. We strongly recommend that you read and follow the product instructions, including all safety precautions. Consumers in New York City, please be sure to review the important information on lithium-ion battery fire safety at the following link: https://www.nyc.gov/site/fdny/codes/reference/lithium-ion-battery-safety.page