Be Safe!-Do not be afraid of the dark night cycling! Your Led bike lights are bright enough to attract the attention of the rear vehicles and alert them to you. You have four lights and can put them on your bikes anywhere. Have these led lights for bikes and no more accidents again!Easy to install - Install your bike lights in seconds without any tools. Your bike lights have three lights modes: full brightness, fast flashing, and slow flashing so you can be easily seen at any time. Your bike lights front and back feature two lithium-ion batteries and offer visibility up to a half-mile.Say Goodbye to Bulky-No more bulky bike tail light with excessive wiring. Your little cute bicycle headlight is waterproof and convenient crafted Classic Glow Bicycle Lights using durable silicone alloy so they can stand up to weather, road use, and even low-impact drops.Use It Anywhere-No just rear bike light, bike light front. It can be your rear bike light, bike lights for wheels,kids bikes lights,stroller lights, bike helmet light, skateboard lights to keep your maximum safety. Take them anywhere you go and give you the courage to defeat darkness.Quality Guarantee-We wants to ensure you 100% satisfied. Therefore, please email us when you have any problem with your lights for bike, we will put a smile on your face again.Features: 1. 4 Kinds of switch: full light, flash, slow flash, off, according to your actual needs can switch quickly 2. Water resistant shower proof design - is not afraid of rain flooding 3. Install or remove without any tools you can get 3 seconds 4. One-Touch switch design, easy operation 5. All the sustainable use of light 45 to 70 hours 6. Scintillation sustainable use of 160 hours 7. Using two CR2032 button batteries for each light Specifications: 1. Materials: Flexible water resistant silicone 2. Light Color: Red 3.Weight:21g 4.Powerd by: 2 x CR2032 batteries for each light Package Included: 4 x Silicone Bike LED Light 16 x CR2032 batteries (8pcs inside lights,8pcs for standby) How do you open the light to replace the batteries Stretch off the rubber from the inside and you will see the cap that twists off to replace the battery. The silicon is covering the battery. Take out the silicon covering to expose the battery. It is not hard and it can be replaced easily.