Features11. Smart sensor bikle front light: The bike front light has an intelligent brightness adjustment function, which can automatically adjust the brightness under the sun to ensure maximum safety during your daily commuting in the flash mode and lighting at night. 22. Powerful and bright bike lights: Adopting German advanced technology, the German lights can produce super bright lights including headlights and taillights to improve the visibility on roads, streets or on the mountains, thereby making your bike safer. 33. Durable and powerful battery: Built-in 2200mAh lithium battery makes the bike LED light brighter in the dark. Powerful running time, up to 4 5+ hours in the highlight mode, up to 10 hours in the fast flashing mode, USB charging with charging protection function. 44. Four brightness headlights: The front row of bike lights has 4 brightness modes: high light/low light/flash and smart sensor mode. 55. Easy to install and lightweight: The silicone mounting strap is designed with two openings, which can be tightly fixed on many handlebars and stretched to keep the light firm. Easy to loosen and fix without any tools. 66. Support: This bike light is suitable for mountain and road bikes.SpecificationName: USB highlight headlightSize: 10.5*4.1*3.6cmPower supply: 2200mAh polymer battery power supplyBulb: Compatible for xpg highlight bulbCharging: Charging red light, full green light, with low battery indicatorLighting: Highlight 4 hoursWaterproof rating: IP5Light mode: Bright, low light, flashing, smart sensorWide range of applications: Can be used for outdoor cycling/climbing camping/fishing and repairing/lighting tools/household emergency/flashlight lightingPackage ListSet 1:1*Bike front lightSet 2:1*Bike front light1*Tail light1*BellSet 3:1*Bike front light1*056 tail lightSet 4:1*Bicycle front light1*Tail light