How to buy the electric mountain bike with price preferential function practical?

HOTEBIKE 26″ City Electric Bike 36V 350W Electric Mountain Bike with Removable Hidden 36V 10AH Lithium-ion Battery, Electric Bicycle 21 Speed Gear, Unique Design Commute Ebike for Men Women Adult (The bike also have 27.5’’ and 29’’)
   
〖Unique Design & Industry Aluminum Alloy Construction〗Distinct design city electric bike, simple and handsome appearance, mixed with a little mountain bike style, perfect for men and women commuting. Lightweight aluminum alloy frame and sturdy suspension fork ensure smooth rides on different road surfaces.
〖Hidden Large-capacity Lithium-ion Battery〗The compact battery is hidden in the oblique bar, and it’s removable, invisible and lockable. There is no doubt that it adds points to the overall look. With 36V 10AH Lithium-Ion battery, the ebike can reach an extra long range up to 35-60 miles per charge (PAS mode), and a full charge takes just 4 hours. Features a 5V 1A USB mobile phone charging port on the LED headlight, you can easily charge your phone on the ride.
〖Strong Brakes & Powerful Motor & Smooth Derailleur〗With front and rear mechanical 160 disc brakes and Shimano 21-speed gears, you can choose any speed and enjoy a safe and smooth journey. To ensure the safety in use and protect the motor, we have installed inductive power-off switches on Shimano brake levers. When you press brake levers, the disc brakes works and the motor shuts down. 36V 350W brushless motor provides high power and high torque output and improves climbing performance.
〖3 Riding Modes & 5 Pedal Assist Modes〗With pure electric driving, you do not need to ride. / With the assisted mode, you can do some easy exercise./ Turn off the power, it becomes a ordinary bicycle./ LCD display can show you 5 different Assist adjustment, Distance, Mileage, Temperature, Voltage, Battery State, etc.
〖PLEASE NOTE〗The ebike has finished most assembling before shipment. The electric system is assembled, you just need assemble front fork, front wheel, handlebar, saddle and pedal, which is easy following the video and instructions〖One Year Warranty〗: One-year warranty for the motor, battery and controller, just buy with confidence! HOTEBIKE customer service team offers the best customer support!!!
   
Specifications:
36V350W Brushless Gears Motor
Maximum Speed is about 20 mph
Multifunction LCD Display
Hidden Quick Release Battery 36V10AH
New design Aluminum Alloy Frame
21 speed gears
Suspension aluminium alloy front fork
Front and rear 160 disc brake
3W LED headlight with USB mobile phone charging port
Charging time: 4-6 hours
Weight: 25 kg (55 lb)
   
36V350W Brushless Gears Motor
high speed geared brushless hub motor
High efficiency: more than 82%
Low noise: less than 60db
   
Large Screen Multifunction LCD Display
Battery capacity indicator
Motor power display
Riding speed
Distance
PAS level
   
Hidden Quick Release Battery 36V10AH
Waterproof lithium battery
Removable
Easy to charge it separately
Long distance
Long life
   
6061 Aluminum Alloy Frame
The material is light and stiff
Strong and designed to last
Efficiency and durability
   
HOTEBIKE is a professional ebike company with more than 10 years experience on ebike development, production and marketing. It is worth trust.