There are two versions of the led collar.
1.USB Charging Version Charging once the light get weaker will help to improve the service lift of the battery
2.Button Battery Version Replace the button battery when power off CR2016 Button battery x 2 pcs Please choose the version you want.
Sizing is as Follows
XS- 11-16 Inches
S- 14-17 Inches
M- 16-19 Inches
L- 18-20 Inches
XL- 20-24 Inches
Brand Name: PawsFourLove
Type: Collars
Collar Type: Basic Collars
Material: Nylon
Type: Dogs
Season: All seasons
Pattern: striped
Feature: LIGHTS
Feature: Quick Release
Material: Nylon/High quality Fiber
Function: Anti-lost/Avoid Car Accident
Feature: USB Charging
Dog Breed: Collar for Small dogs/Medium Dogs/Large Dogs