- This HIGO silicone collar with 360 degree light visibility, 12 high-brightness LEDs prevents your pet from accidents, keeps your dog safe in the dark, and makes your pet visible and attractive at night. 2 . The necklace is 27 inches long and can be cut from 11 to 27 inches. It is suitable for all breeds and can be cut to any length to suit your pet and breed size. For small breeds, double wrap the collar to avoid cutting the collar. 3. The USB charging interface is equipped with a USB data cable, charging for about 2 hours, continuous fast flash for 4-5 hours, slow flash for 6-8 hours, steady light for 2-3 hours. 4. Lightweight - It’s made of silicone, so it’s lightweight, comfortable, and never afraid of biting or rubbing. Waterproof design for walking in rain, snow or other severe weather.