One end contains a non-contact infrared thermometer. Press the button to scan temperature and release to hold. The IR thermometer has a response time of 1 second and is protected by a lens cap when not in use. Range -33 to 220°C (-27 to 428°F), resolution 0.2°C, accuracy ±2.5% or 2.5°C. Fixed emissivity 0.95 with field of view 1:1. Two LR44 (button cell) batteries provide 35 hours of continuous temperature measurement.

The other end of the pen features a super bright white LED inspection light. A standard AAA battery provides 6 hours of continuous illumination.

All batteries are included and the display will inform you when they need to be changed. Comes in an attractive foam line metal case. Dimensions: 6 x 0.5"".