Malker Bicycle Light Front and Rear Silicone LED Bike Light Set Headlight and Taillight,Waterproof &Safety Road,Mountain Bike Light,Batteries Included(Black Silicone, 2pcs white and 2pcs red light)

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: white silicone white light,red silicone red light,blue silicone blue light,black silicone white light
3.Weight:21g
4.Powerd by: 2 x CR2032 batteries for each light

Package Included:
4 x Silicone Bike LED Light
8 x CR2032 batteries (inside lights)

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.