Feature: -Smart speed sensor：induction to slow down，the 100 Im will highlight. -Intelligent induction：induction to 3 minuies rest,would automatically shut off,will automatically turn on after sensing vibrations. -Strong light switch,the light automatically shut off,the light automatically open. -COB High-Brightness Led headlight -USB cable -Rechargeable Lithium polymer battery (3.7V 500mAh) -Quick release handlebar mount(fits for 22-33.9mm) -Charge time dependent on wall charger or computer We will ship from real US warehouses, dispatch in 0-1 day,fast and efficient shopping experience, as well as brand quality assurance for you. Description： Name：Intelligent speed inductionbrake lights Brand：MEROCA Bulb type：C0B LED Charging：USB Highest brightness：100 lumens Battery：500mAh Light angle：180.