Description: *Bright LED Tail LightThe 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 RechargeableBuilt-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 ModesThe 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 *WaterproofThe 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 BracketSuitable for 22-31.8mm all types of bikes, such as road and mountain bikes. No other installation tools are requirednon-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