Imuse Technology Limited Obtained the Hoverboard UL Certification(E483758) on 24 June 2016. High quality dual two wheels self balancing smart electric mini scooter Double balancing systems keep you in balance Security protection: tilting protection, speed limit protection, low battery protection A revolutionary green product for personal transportation that can be easily carried around on bus or subway With retail package Specifications: Max Speed:12km/h Distance around 20-25km(depends on rider's weight, road conditions etc) Max tilt around 15°-30°(depends on rider's weight) Battery 36V*4.4AH(158WH) lithium battery Using temperature 10 degree centigrade -40 degree centigrade (recommending at 10 degree centigrade -30 degree centigrade) Max load 120kg Engin 250W each Charging voltage AC110-240V 50-60HZ Charging time Around 60-120 Mins (30 Mins to 80%) Speed protection 10km/h(contain)-15km/h(no contain) Low battery protection when battery is lower than 10%, it will slow down and finally stopped working Size 584*168*178(mm) Tyre size 170mm Weight 12kg Power switch LED works when turned on and keeps twinkling under protection circumstances. Voice alert Beeps when turned on and has a low battery capaci Package Included: 1 x Two Wheels Self Balancing Smart Electric 1 x Power Supply Charger 1 x Manual