Description: *【Bright LED Tail Light】The bike tail light is built-in 30 super-drive lamp beads, 100 lumens or more, to ensure brightness. There are red,white,red and blue changing light, and red and white changing light, 4 light colors for your *【USB Rechargeable】Built-in 500 mAh lithium battery. Compatible with mobile phones, computers, and other charges. The working time is about 4 hours in constant light mode, 12 hours in flicker mode. *【5 Lighting Modes】The bike tail light has 5 lighting modes, red light always on/blue light always on/red light fast flashing/red light slow flashing (SOS)/red and blue flashing *【Waterproof】The bike tail light is IPX4 (daily waterproof) rating. Rain-proof design, no need to worry in rainy or unexpected. The warn ing distance is about 200 meters. *【Quick Release Handle Bracket】Suitable for 22-31.8mm all types of bikes, such as road and mountain bikes. No other installation tools are required—non-slip rubber, dedicated to bicycle handlebars Specification: *Light colors: Red,White,Red and blue light, Red and white light (optional) *Power interface: USB charging *Lithium battery capacity: 500mAh *Working time: 4 hours in constant light mode, 12 hours in flicker mode *Warn ing distance: 200 meters *Lighting Modes: steady on/steady on/Red flash/Red slow flash (SOS)/red and blue flash *Material: ABS *Size: 8.5 * 2.5 * 2 cm *Waterproof grade: IPX4 (daily waterproof) *Suitable for 22-31.8mm/ 0.86-1.25" Package Includes: 1x Bike Tail Light 1x Buckle 1x USB Charging Cable Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Made of high quality material, durable and practical to use Brand new and high quality Good function and reliable to use We will ship it ASAP,when you place the order We provide perfect customer service, you can buy with confidence. If you have any questions about our products, you can feel free to contact us.