Smart Bike Tail Light IPX6 Waterproof Bicycle Rear Brake Light Rechargeable Warning Light Features: 5 lighting modes provide convenience during nighttime activities. Red light mode with 3 levels of brightness adjustment. Built-in intelligent sensor,the light will turn on automatically for low brightness and turn off in high brightness.(NOTE: The function is not suitable for Blue&Red Flash Mode and Red Light Mode.) The light will automatically turn off when detecting no vibration after 30 seconds.And the light will automatically turn on when detects any vibration.(NOTE: The function is not suitable for Blue&Red Flash Mode and Red Light Mode.) During your braking time,the light will automatically turn on for more safety. Built in a 260mAh rechargeable battery,easily recharge from your charger,power bank,etc. IPX6 water resistant offers convenience during rainy days. Two installation methods to easily install on your bike. Wide application for your scooter,helmet,backpack,etc. Specification: Material: ABS + PC Waterproof: IPX6 Battery: 1* built-in 3.7v 260mAh Charging time: 1hr Working Time: (high bright)8-9hrs ; (middle bright)15-30hrs ; (low bright)25-50hrs Work temperature: -10℃ ~ 60℃ Storage temperature: -20℃ ~ 60℃ Size: 33 * 30 * 33 mm / 1.3 * 1.2 * 1.3 in Weight: approx. 19.4 g / 0.7 oz Package size: 135 * 75 * 40 mm / 5.3 *3.0 * 1.6 in Package weight: approx. 81.8 g / 2.9 oz Package List: 1* Rear Light 1* Silicone Band 1* Saddle Bracket 1* Pipe Bracket 1* USB Charging Cable 4* Tie Straps 1* User Manual