Technology for the hunt, security or law enforcement! Heatseeker works by detecting heat sources and motion of heat to help find game and bad guys. Temperatures are read as infrared light waves which appear on the digital bar graph display. A "squelch" alert can also be heard through the ear plug. Detects objects as close as 2' and can reach as far as 900' under optimum conditions! Great for scanning woods, tracking wounded animals or personal security. Features: - Built-in laser and infrared sighting makes acquiring targets easier... can be turned on and off - Infrared laser capability for tracking in total darkness while using night vision - Adjustable volume, for when silence is critical - Runs on one 9V battery (included) - High-impact ABS plastic construction - 7" long and weighs just 8 1/4 ozs. - Includes belt pouch, earphone and wrist strap. Specifications: Model: HS3500C Length: 7in (19cm) Diameter: 1.75in (4.64cm) at handle Red Laser Wavelength: 650nm Output: <5mW Infrared Laser Wavelength: 850nm Output: <5mW Detection Range: 2 - 900ft (0.3-300m)* Volume Increments: 7 levels Gain Increments: 64 levels Weight with Battery: 8.25oz (250g) (Requires one 9V Battery) Construction: High-impact ABS Plastic Finish: Camo