The milestone camping brand brings this simple and practical safety led shoe light clip for night time running walking or even cycling simply clip the led light to your shoe heel and decide if you want it to flash or be on permanently and away you go the replaceable cr2032 batteries will operate for 72hrs on continuous mode or 96hrs flashing so it should last for a few trips out and about when in poorly lit areas no complicated mechanisms just stretch over the heel and its in place and rea