Welcome to the Addmotor! Founded in 2011, Addmotor began with one goal in mind: making the highest- quality electric bicycles accessible for everyone. We have a U.S. Customer Service Center. With 2 years of technical support! One-year service for the electric motor, battery, LCD display, and the controller you've no worry about using it. Please don't hesitate to contact us if you have any questions. We will reply to you within 24 hours. Do you enjoy the mountains, the outdoors, or enjoy challenges and more difficult terrain? M-550 P7 electric bicycles is probably perfect for you! This electric mountain bike with 750W Motor, 48V 17.5Ah Battery, ensure you a long-distance riding. The ride to work, a weekend trip, or a ride through the countryside with many uneven undergrounds is no problem for the M-550 P7. Max. Speed: 26 MPH Pedal Assist: 5 Level Pedal Assist Tires: Kenda 26" X 4.0" Fat Tires Battery: 48V*17.5Ah Lithium Panasonic Cell Batteries Motor: Addmotor 48V*750W Rear-Mounted Geared Hub Brushless Motor Controller: Addmotor 25A Controller Charger: US Standard DC Smart Charger Throttle: Variable Speed Control - 1/2 Twist Throttle Headlight: Integrated Lights Powered By Main Battery Charger Time: 5-6 Hours. Range: 45-55 Miles with PAS 1 Rear Rack Load: 55lbs Recommend Rider Heights: 5'10"-6'6" Bike Max Load Capacity: 300lbs