1.Super Bright LED Lights and Higher VisibilityThis LED dog collar includes 18 super bright LED light beads (twice brighter than other similar stylish lighted collars on the market), ensuring your dog is visible and safe, avoiding accidents, Save your dog's life. 2.15 Lighting Effects in OneThe dog collar with lights adopts RGB color changing, it is a multi-color flashing mode, you can choose 15 kinds of various mode color changing settings according to your needs to make your dog look unique and cool. 3.USB CHARGING AND LONGER BATTERY LIFEThe dog LED collar is charged by a universal USB cable (included). Rechargeable, eco-friendly and recyclable. Charging for 1 hour can provide continuous lighting for 3-6 hours. Don't worry about running out of battery when walking your dog. 4.BEST SIZE FITSOur glowing dog collar is about 27.6" (70cm) long and 1" (2.5cm) wide, but you can simply cut off the excess length to fit your dog's neck. There is no hassle in choosing a collar size when purchasing. Note: When cutting, make sure the cutting position is between the two LED beads and cut from the side marked with "scissors". If you are still not clear, please refer to the product pictures.