-How does it work?
Already you should calibrate it, one is an object in the room leaks. Then once calibrated, we seek around doors, windows, or even on the walls. The color changes according to the temperature difference.
- Conclusion
For 40 euros you can save money on your heating bill. So Go ahead and do not listen to the negative comments.
Attention: the calibration is lost at shutdown. A battery is supplied with the gun.