Details

LED adjustable collar for small medium and large dogs. Glowing and flashing features anti-lost and waterproof.

There are two versions of the LED collars.
First is the USB charging version

Second is the  battery version 
(CR2032 button battery x 2)

Provide safety for your dog and pet while you go out alone at night.
Make your dog visible at night or in bad weather conditions
Helps ensure the safety of you and your dog and other pets when walking.