Clip onto leashes and harnesses or strap onto collars Switch between Flashing and Steady-On by flipping the battery Visible from all directions (omnidirectional) Extremely durable, temperature resistant and waterproof Includes attachable Belt Clip and 8.5? Velcro Strap for dog collars and straps The Guardian? Dog Collar Light includes a velcro strap and belt clip, making it easy to attach to your dog?s collar, harness or leash. This light helps keep your canine friend visible to night-time drivers. Patented Reverse Polarity Program Switching? technology allows the function of the light to be changed between Flashing and Steady-On modes by simply flipping the battery over. Battery Source: 6V Lithium Coin Cell Battery Pack (included) Optional Battery: 2x Cr2032 3V Lithium Coin Cell Visibility Range: 3 miles (5km) Waterproof Rating: 100 Meters (328 Feet) Operating Temperature: -20 to +60C Environmental Seal: O-Ring Dome Lens: High Impact Polycarbonate Housing Material: High-Tech Polymer Technology: Patented Omnidirectional Optics, Reverse Polarity Program Switching Battery Duration: (may vary with temperature) Flashing ~240 Hours Steady-On ~100 Hours Adventure Lights Guardian Dog Signal and Safety LED Light Collar Pet Beacon Clip onto leashes and harnesses or strap onto collars Switch between Flashing and Steady-On by flipping the battery Visible from all directions (omnidirectional) Extremely durable, temperature resistant and waterproof Includes attachable Belt Clip and 8.5? Velcro Strap for dog collars and straps The Guardian? Dog Collar Light includes a velcro strap and belt clip, making it easy to attach to your dog?s collar, harness or leash. This light helps keep your canine friend visible to night-time drivers.Patented Reverse Polarity Program Switching? technology allows the function of the light to be changed between Flashing and Steady-On modes by simply flipping the battery over. Battery Source: 6V Lithium Coin Cell Battery Pack (included)Optional Battery: 2x Cr2032 3V Lithium Coin CellVisibility Range: 3 miles (5km)Waterproof Rating: 100 Meters (328 Feet)Operating Temperature: -20 to +60CEnvironmental Seal: O-RingDome Lens: High Impact PolycarbonateHousing Material: High-Tech PolymerTechnology: Patented Omnidirectional Optics, Reverse Polarity Program Switching Battery Duration: (may vary with temperature)Flashing ~240 HoursSteady-On ~100 Hours (description exceeds maximum possible length)