[Smart Uphill】- A 14 inch ebike doesn't have to be this nimble, but it is. Our 750W peak motor, seamlessly integrates intelligent algorithms. Effortlessly conquer inclines with automatic recognition and tailored assistance. Experience a breezy 15° uphill journey, complemented by a top speed of 20mph【Energy Saving Battery】- The 36V 7.8Ah replaceable battery completely hidden inside the ebike frame for protection. 2X fast charge in 3-4 hours to power your ride for up to 25 miles (pedal assist mode)【Safe Riding】- Our electric bicycles are certified to the strict standards of UL2849 and CFR1512. Dual disc brakes provide ALL weather stopping power, front and rear lights enhance visibility, promoting safer rides day or night【Variable Ride】- Choose between pure electric mode, pedal assist mode, and normal bike mode. Our U1 electric bike offer 3 levels assist speeds to keep you flowing through traffic