tooltop t7pro 256 192 visible thermal imager dual camera fusion 25hz android thermal camera electrical device construction testNote: In order to correct non uniformity, a mechanical control calibration plate is installed in front of the thermal imaging detector, which will be calibrated every 10 seconds to ensure more accurate measurements. Usually, there is a pause of about 1 3 seconds, which is caused by the thermal imaging detector calibration . This is a normal phenomenon, please don't worry Features: 256 x 192 infrared Sensor & 640 x 480 Visible Light Dual Lens: 256*192