Give your pet a PRIVATE SECURITYMAX!Why choose Leadleds led dog collar:✔Super Bright LED Sign Light Up Ultimate visibility from every angles. the led sign screen with blue led bluetooth connected your smartphone app programmable message it can display pet nicknames and the owners phone number friendly used.✔Long battery: built-in rechargeable battery will be last 10-15 hour after full charge.✔Adjustable collar: you can set the best size for your dog and your dog will wear it more comfortable.✔Package include: 1x led dog collar ( with led sign screen and rechargeable battery) 1x usb cable 1x user manual