Jackie 1 Pc Nylon LED Dog Night Safety Collar Flashing Light up Circular Pendant Collar -Large LED light glows and flashes in darkness. 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. Easy to use: simply pushing the control button makes the light ON/FLASH/OFF. Size:XL: W-2.5cm L-52 cm extends till 60 cm