Ferand LED Pet Collars Dog Night Safty Collar, Flashing and Solid, Nylon, Camouflage, 7 Colors and 4 Sizes LED light glows or flashes, making your dog visible in complete darkness. An easy and attractive way to keep your dog safe during night walks. Made of nylon. M: Width 2.5 cm, Length 40-48 cm (W 1", L 15.5-19") 4 modes controlled by a switch button on the collar: Solid Light/Fast Flash/Slow Flash/Off Take an easy step of getting a lighted collar for your beloved dog!