Features1Five modes can be switched according to different scenes to meet different needs and make your riding safer. 2High brightness, rechargeable, waterproof life, longlasting battery life, can be fixed on the rear of the car, backpack, etc. 3Installation and disassembly are convenient and fast. The mounting bracket and adjustable silicone band make the tail light more flexible. 4Waterproof and durable, and long battery life, 20 hours of battery life after fully charged. 5Not only plays the role of lighting, but also serves as an alarm reminder, making travel safer.SpecificationItem Type: Bicycle Tail LightBattery Type: Lithium Battery (Built-In Battery)Battery Capacity: 250mABrightness: 20 lmWaterproof Mode: Life WaterproofBattery Life: 20 Hours of Battery Life After Fully ChargedFunction: For Automatic Flashing Light, Flashing Light Always On, 5 Medium Flashing Light Modes (Flowing Water Flashing, Chasing Flashing, Breathing Flashing, Warning Flashing, Exposure Flashing)Package List1 x BicycleTailLight1 x Fixed Strap1 x Charging Cable1 x User Manual