Product Description Warranty (from the date of purchase): 3 months warranty 30-day refund Specification: Wheel Size: 6.5" Tyre Charging time: 3-5 hours Use time: 30-40 minutes Rider Weight Range: 20~90kg (44-200LBS) Weight range for better experience: 20~70kg (44-154LBS) Maximum climbing angle: 10 degrees The package contains: 1 x Two Wheel Hoverboard 1 x Power Charger 1 x user manual (English language not guaranteed). NOTES: ▶Please fully charge before using for the first time. Disconnect the plug after charging to avoid overcharging. ▶Remember that the range of motion should not be too large, as much as possible to avoid excessive tilting. ▶Children should be accompanied under the guardianship of an adult, and the speed should not be too fast. ▶Do not swerve at high speed. ▶DO NOT start or stop operation on a slope, in order to avoid damage to the self-balancing system or causing operating errors. ▶DO NOT use the hoverboard when the "BATTERY LOW" light is on. STEPS TO CONNECT BLUETOOTH: 1.Turn on the Bluetooth of your phone; 2.Start the hoverboard; 3.Find the corresponding device named "HY-A02" and click connect. You will hear a sound like "Ding-dong" from the hoverbaord. Then you can open the music app and enjoy the music. And the volume can be changed by adjusting the volume of your phone. HOW TO RESET: 1. Turn off your hoverboard. 2. Place your hoverboard on the floor, make sure your hoverboard does not tilt in any direction and calibrate the balance to a horizontal level