Clip onto clothes or wear as an armband 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 Stretch Arm Band High-visibility equipment is a must for a safe night-time jog. The Guardian? Running Light helps ensure you will be seen when it counts. Modular attachments allow the Guardian? to be either clipped on to clothing with the belt clip or attached to the runner?s arm with the arm band. Thanks to patented Reverse Polarity Program Switching? technology, the function of the light can be changed between flashing and steady on modes by simply flipping the battery over. With the Guardian? Running light, runners can practice their sport with peace of mind. 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 LED Signal and Safety Running Light Armband Beacon Clip onto clothes or wear as an armband 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 Stretch Arm Band High-visibility equipment is a must for a safe night-time jog. The Guardian? Running Light helps ensure you will be seen when it counts.Modular attachments allow the Guardian? to be either clipped on to clothing with the belt clip or attached to the runner?s arm with the arm band.Thanks to patented Reverse Polarity Program Switching? technology, the function of the light can be changed between flashing and steady on modes by simply flipping the battery over.With the Guardian? Running light, runners can practice their sport with peace of mind. 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)