This is the HPI Racing Temp Gun for nitro and electric RC racers. The HPI Temp Gun is a non-contact infrared thermometer for measuring temperature Perfect for RC nitro and electric racers Used as a serious diagnostic tool for tuning nitro and electric motors to maximum performance Can be used to optimize handling by measuring track and surface temperatures resulting in faster lap times and extended engine life Easy to read large LCD readout screen Ergonomic gun shaped design Quick point-and-click temperature detection Auto-shut-off mode for extended battery life Instant Fahrenheit to Celcius conversion for extra versatility HPI Racing Temp Gun Lanyard Pre-installed CR2032 battery. Nothing Measurement Range: (-67 - +428)F or (-55 - +220)C Operating Range: (14 - +122)F or (-10 - +50)C Accuracy: +/- 1.08F or +/- 0.6C Responce Time: 1sec D:S: 1:1 Emissivity: 0.95 fixed Update Frequency: 1.4Hz 113.0 X 39.4 X 36.5mm Wave Length: 5um-14um Weight (no battery): 37g Weight (with battery): 40g Mode: min, max, lock Power Supply: CR2032x1 Battery Life: Typ.40hr Min.30hr jb 4/13/05 ir/jxs &