This product is operated by the"Thermal Viewer " software onthe mobile phone after connecting to the mobile phone ofAndroid system. It is very simple to view the infrared image ormeasure the surface temperature of the obiects. This productcan be used for HVAC, building heat difference detectionequipment troubleshooting, preventive and predictivemaintenance etc. Thermal imaging can be used day and night, as long as the object (thermal energy) emits infrared light, it can receive images within a certain distance. If your phone does't have USB Type C interface, please use original adapter for conversion, the product contains an adapter. Made of fine quality materials, practical and has a long service life. There is a small storage box that can protect the thermal imager for easy storage. Function: center point temperature display, point temperature measurement, image fusion, mirroring, temperature unit setting, palette setting, face detection On/Off, taking photo, video recording, picture/video viewing. Specifications: Temperature range: -20 ¡æ to 300 ¡æ Accuracy: ¡À3¡æ or ¡À5% of reading Resolution: 0.1 ¡æ or 0.1 ¨H Working band: 8 ¨C 14¦Ìm Pictures & Videos Horizontal viewing angle / vertical viewing angle: 43¡ã¡À1¡ã/ 43¡ã¡À1¡ã Infrared image resolution: 32x32 Visible image resolution: 640x480 Image format: png Video format: mp4 Frame rate: 9Hz Focal length: fixed Package Included: 1 * Mobile Phone External Thermal Imager