Specification:Material: ABSSize: 4.5*3*1.4cmBattery capacity: 200mAhCharging time: about 3 hoursUse time: about 5-15 hoursLumens: 20 lumensLighting mode: red always-on/flash mode, white always-on/flash modeNotes:Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.Due to manual measurement, there is a tolerance in the product size. 11. Powerful Bicycle Tail Light: No false claims here, our LED Bicycle Tail Light has a real, lab-tested 20-lumen output, wide 180-degree beam angle visibility for safe riding and is a competent day and night Bicycle Light. 22. 4 Fashion Lighting Modes: Red Always-On/Flash Mode, White Always-On/Flash Mode, 2 Eye-Catching Colors, 4 Lighting Mode Settings, Causing a Lot of Attention Absolutely guarantee your popularity! 33. Good USB Rechargeable Battery Life: 3 hours charging = 5 to 15 hours continuous (depending on the light mode). For fast charging, simply connect the bike light to any USB device such as a power bank, car charger, or AC outlet adapter. (Please fully charge it before first use after receiving light.) 44. Fits Every Bike: This rechargeable bike light can be installed in seconds without tools, is suitable for all types of bikes, road bikes, mountain bikes, hybrids, and can also be used as a helmet light, Backpack light, wheelchair light, scooter light and caution light. 55. Package Contents: 1 Tail Light, 1 Bracket and 1 Cable.