This is the HPI Racing Temp Gun for nitro and electric RC racers.

FEATURES: 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

INCLUDES: HPI Racing Temp Gun
          Lanyard
          Pre-installed CR2032 battery.

SPECS:    Measurement Range:     (-67 - +428)F  or (-55 - +220)C
          Operating Range:       (14 - +122)F or (-10 - +50)C
          Accuracy:              +/- 0.6C
          Responce Time:         1sec
          D:S:                   1:1
          Emissivity:            0.95 fixed
          Update Frequency:      1.4Hz
          Dimensions:            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