Great Performance on Your Commuting: Equipped with 500W peak motor and high capacity battery, it allows for speeds up to 19mph and 15-18miles under specific conditions. Perfect for daily commuting or short trip. Max load is 220 lbs. Keep You Safe: It's more safe and professional. Bright headlight make you visible at night. Dual braking system (features a drum braking and EABS anti-lock braking) ensure your safety. LED Display & Smart Control: Clearly check the current speed, speed mode, cruise control on the LED display. With the smart phone connected, multi-functional APP make your riding more convenient. such as lock/unlcok; set up customized max speed; cruise control, etc. Quality Assurance: This scooter for adults offers one-year warranty or 180-days for different parts. Please feel free to contact us. we will respond within 24 hours. Product Specifications: Battery: 36V/7.5AH; Rated Motor: 350W Range: 14-17MILES Top Speed: 19MPH Max Load Capacity: 220LBS Charging Time: 3-6H Waterproof Rating: IPX4 How to adjust disc brake? 1. You need a hex wrench to loosen the bolt on the cable clamp. If the discbrake is dragging,slide the arm of the clamp backward along the cable while holding the cable in one hand. Then, retighten the bolt on the brake clamp. 2. If the disc brake does not work efficiently.the cable is slack. You need toslide the arm of theclamp forward along the cable while holding the cable in one hand.Then,retighten the bolt on the brake cable clamp.