Yosoo LED Flashing Dog Walking Belt Harness Leash Strong Nylon Webbing Tether Pet Safety Collar Comfortable Strap Vest for Large Medium Dog Power source: LED light Bright light can be seen from far away, can helps to keep you and your dog & other pets safe during walking. Also work as a decoration: let your dog more attractive. Easy to use: simply pushing the control button makes the light ON/FLASH/OFF. It can last 60 hours in the still-on model while 70 houes in the flash model.