Intelligent Induction Brake Bicycle Tail Lights USB Charging Mobile Start Stop And Equipment For CyclingFeatures: Sensitive and intelligent sensing brake Equipped with a high-density speed sensor, when sensing the deceleration of the vehicle, the red light flashes for 5 seconds before returning to the current mode. Vibration sensing, automatic wake-up When the car is stationary for 20 seconds, it will start automatic mode, enter sleep mode, and the ride will automatically wake up. 800mAh USB Fast Charging The USB universal interface design can connect mobile power sources, computers, plugs, etc. for charging, making it convenient and fast. 16 LED 3014 Beads High brightness LED wick with good material, stable function, and longer service life. Life grade Waterproof IPX5, good sealing, life grade, no fear of riding on rainy days. Small and exquisite, easy to carry The car lights are lightweight and exquisite, weighing 55 grams. They are as light as nothing, making them easy to carry when traveling.Product Description: Product Name: Bicycle Tail Light Product color: black Product material: ABS Light source type: LED 3014 beads Charging voltage: 5V/0.4A Working voltage:3.7V Battery capacity: 800mAh Light colors: red light, blue light Charging form: USB direct charging Charging indicator: Charging green light flashing, fully charged green light Waterproof grade: IPX5 Service time:35 hours in the first mode of the marquee,17 hours in the second mode of the marquee, and 20 hours in the double flashing mode Light gear: Two types of running light modes, flashing mode. When braking is detected, the red light flashes for 5 seconds before returning to the pre braking mode. When stationary for 20 seconds, the sleep mode is activated and automatically wakes up while cycling. Package size:10.27.53cm/42.91.2in Package weight:90g/0.2lbProduct List:1 Bicycle lights2 Support1 Instruction manual1 Charging cable1 Tie straps