POWERFUL 1000W MOTOR & REMOVABLE BATTERY: TotGuard electric bike with a peak 1000W high-speed brushless motor and 48V 10Ah lithium-ion battery offers a top speed of 21.6MPH, allowing you to conquer any terrain with ease. The removable design of the battery makes it convenient to charge on/off the bike, about 5 hours of charging time. All of our e bike have passed SGS Certified to UL 2849 and UL 2271. AMAZING RIDING PERFORMANCE: 26"*4.0 puncture-resistant fat tires provide excellent traction on slippery roads; Lockable front suspension and rear seat suspension help to handle the bumps in the road; Dual disc brakes ensure reliable braking force and sufficient stopping power in any condition; the LED headlight/horn/reflectors make your ride more convenient and safer INTELLIGENT LCD DISPLAY & 21-SPEED GEARS: The smart LCD display on this fat tire electric bike shows the battery power, 3 assist levels, mileage, voltage, speed, and use time, making it easy to read your statistics. With 21-speed gears, you can conquer any terrain with efficiency 4 WORKING MODE & 3 SPEED MODE: Regular Bicycle /Pedal Assist/Ebike Mode/Booster Mode to customize your ride. 3 Different Speed Modes: mode 1 (6.4mph), mode 2 (12.8mph), mode 3 (21.6mph). Press the LCD display "+" or"-" buttons to choose three power options ASSEMBLY & TECH SUPPORT: This electric mountain bike comes 85% pre-assembled. The assembly video and user manual are on the product page. The whole package weighs 83.7 lbs, max load 330 lbs/150kg, recommended height: 5'7"-6'9". 1-year for bike parts and technical support are included. If you have any problems with the e bike for adults, please feel free to contact us Troubleshooting Steps: The bike does not work, Insufficient battery power or Faulty connections or Battery not fully seated in tray or Improper turn on sequence or Blown discharge fuse; Please Charge the battery or Clean and repair connectors or Install battery correctly or Turn on bike with proper sequence or Replace discharge fuse