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: XS:22-45 width:2.0cm S:30-40cm Width: 2.5cm M: 38-50cm Width: 2.5cm L: 48-60cm Width: 2.5cm XL:62-70cm Width 2.5CM Specification Power source: LED light Light color: Red, Yellow, Blue, Green, Orange(Gold), Pink Modes: Quick flash-slow flash-still on Battery: 2 'CR2016 button batteries (pre-installed) Note: This Item Can Be Removable and washable Item Include: 1pc x Pet Led Collar