Description:This bike light set is versatile enough for cycling, hiking, camping, or any outdoor activity and can be used as emergency flashlight.waterproof and easy to install， waterproof and dust-proof bike lights can withstand all adverse weather conditions.This is great for cycling at night or in places where visibility and safety are concern. So, just start your next adventure with us.Specification:Dimming mode: 1) Sliding linear dimming 2) Button dimming 3) Fully automatic dimmingWorking mode: constant light (linear or 4-speed dimming), flashingDisplay: remaining running time display, brightness / gear displayBattery: 3350mAh ultra-high capacity rechargeable lithium-ion batteryCharging port: USB Type CCharging time: about 3 hoursOperating temperature range: -10°C~40°CRunning time: energy saving (100 lumens) about 14 hours, high brightness (450 lumens) for 3 hours, super bright (600 lumens) about 2 hours, flash mode about 36 hoursSize: 10cmX3.1cmX5.1cmWaterproof rating: IPx5Weight: 138g (including battery)Packing list:1*Bicycle headlightNotes:Keep away from fireThank you very much for your trust and support, and I wish you a happy life.