... high elastic frameTire:10.5 in low pressure vacuum rubber tiresHub:6 inches magnesium alloy of ... Short Circuit/Overheating Protection,Auto-Sleep/Wake-up,detailed information of battery can be checked with Ninebot ... of the electronic products including the Smart Balance Scooter,Laptop,Tablet PC,Power bank etc.,We are ... R&D center,QA&QC Dept.,PCB assembly line,Aging test,Warehouse,Sales&after-sales service ...