1.ADVANCED DESIGN: USB rechargeable light, built in 650mAh rechargeable lithium battery for each light. Water rated to IPX4 - Protected against splashing water from any angle.2.FOUR LIGHT MODE OPTIONS: The Headlight and Taillight feature an one-touch switch with four different lighting modes depending on your preference. Include full brightness, half brightness, fast flashing and slow flashing.3.EASY INSTALLATION: The silicone mount straps are designed with two openings that tightly fit around many size seat posts, handlebars, seat risers, backpacks, helmets and stretch to keep lights secure and firm. They can be easily loosen and fasten, and no Tools are required.4.MUTIFUNCTION: This bike light set is versatile enough for cycling, hiking, camping, or any outdoor activity and can be as emergency flashlight. This is great for cycling at night or in places where visibility and safety are concerns. So, just Start your next adventure with us.descriptionMaterial: ABSSize: 5.5cm x 5.5cmColour: BlackGlow color: white x1 red x1Lamp beads number: 3 LED lightsLamp Bead Type: COBLumen: 50lmMode: Glare, Medium Light, Blinking, FlashingCharging time: 2-3 hoursLife time: 2-8 hoursCharging method: USB chargingBattery: Built-in lithium battery 650mahPackage Contents:2 x warning light (white light x1 red light x1)2 x usb line2 x strapsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.