Infrared Thermometer, Temp. Range (F) -49 Degrees to 752 Degrees F, Temp. Range (C) -45 Degrees to 400 Degrees CAccuracy +/-2 Degrees F/+/-1 Degrees CBattery Type (2) AAAResolution 0.1 Degrees F/0.1 Degrees CResponse Time 0.5 sec.Special Features Safe, Non Contact Infrared Thermometer Measures Surface Temperatures, Scan, Hold and Auto Off Functions, F Degrees /C Degrees Selectable, Includes 9V Battery Thermometers and TimersHandheld Thermometers3NZR8 features 3-pt. calibration for +/- 1% accuracy at any point. 3NZR9 includes memory recall, on/off switch, and a battery. 3NZT1, 3NZT2, 3NZT3 feature on/off switch with auto shut-off and gives 1-sec. updates. Battery included. Waterproof and NSF Certified. 3NZT1 and 3NZT3 can be recallibrated with HACCP requirements. 3NZT4 is recalibratable and has a 2-stage off button with timer. Includes battery. 3NZT5 is self-calibrating and gives accuracy 0.5 F in HACCP temperature ranges and 0.1 F/0.1 C in resolution. Includes battery. NSF Certified.