Features: LED light glows and flashes in darkness. Bright light can be seen from far away. Helps to keep you and your dog & other pets safe during walking. Provide safety for your dogs and pets while it's out alone at night. Also work as a decoration: let your dog more attractive. Easy and comfortable to wear and remove. Easy to use: simply pushing the control button makes the light ON/FLASH/OFF. Pet Bust Size: S: 35-43cm Width: 2.5cm M: 40-48cm Width: 2.5cm L: 45-52cm Width: 2.5cm XL: 52-60cm Width: 2.5cm Specification: Power source: LED light (Note: the color selection only for LED light,not for collar itself!!!) Light color: Red, Orange, Yellow, Green, Blue, White, Pink, Multi-Color Modes: Quick flash-slow flash-still on Battery: 2 * CR2016 button batteries (pre-installed) Product weight: 60g Note: This Item can be removable and washable