The product description 1. High visibility: lights on collar is specially designed for dogs security, dogs often need to play outdoors, if you meet a dog visibility, collar is, you need light collars visibility is very high, the lights on collar allows you to track your dog in the dark, don't worry about the safety of the dog, no matter how dark, you will know where is your best friend. 2.1 Collar and 1 flashing mode: long press for 3 seconds to turn on the power, the LED dog collar has 7 different LED lights and 1 flashing mode, press the switch to change the color, the dog collar can change every 7 colors. It can display stable solid colors and you can carry your favorite colors to different days. Dog collars can make you feel different. LED leads make walking at night safe, bright and fun. 3.USB rechargeable: This lighting dog collar is USB-rechargeable, energy-saving and requires no battery. The dog collar comes with a USB cable that can be charged from any USB device. USB Rechargeable dog collar won't waste your precious time and money looking for batteries. When fully charged, it can work continuously for about 8 hours. 4. Easy to use: Lightweight, strong and durable, LED pet collars work well. A good glowing dog collar is worth it. Lightweight and breathable, designed for your dog, this collar is made of durable nylon ribbon material to make your dog feel more comfortable and comes with a metal D ring for leash attachment.