"This product is operated by the ""Thermal Viewer"" software on the mobile phone after connecting to the mobile phone for Android system. It is very simple to view the infrared images or measure the surface temperature of the objects, this product can be used for HVAC, building heat difference detection,  equipment troubleshooting, preventive and predictive maintenance, etc. Features: 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. Easy to use, you just need to download the ""Thermal Viewer"" software on the mobile phone, then insert the thermal imager into your phone and the ""Thermal Viewer"" software will be opened automatically. If your phone does't have USB Type C interface, please use ori-ginal 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, images fusion, mirroring, temperature unit setting, palette setting, face detection On/Off, taking photo, video recording, picture/video viewing. Specifications: Material: metal Color: black Temperature range: -20℃ to 300℃ Accuracy: ±3℃ or ±5% of reading Resolution: 0.1℃ or 0.1℉ Working band: 8-14μm Horizontal viewing angle / vertical viewing angle: 43°±1°/ 43°±1° Infrared images resolution: 32 * 32 Visible images resolution: 640 * 480 Images format: png Video format: mp4 Frame rate: gHz Focal length: fixed Operation temperature range: 0℃ to 35℃ Storage temperature range: -20℃ to 60℃ Plug: USB Type-C Power supply: power supply from external devices, such for Android phones Item size: 60 * 30mm / 2.4 * 1.2in Item weight: 19g / 0.7ounce Package size: 175 * 100 * 60mm / 6.9 * 3.9 * 2.4in Package weight: 250g / 8.8ounce Note: This product is only suitable for Android phones with OTG function. Package List: 1 * Mobile Phone External Thermal Imager 1 * Adapter 1 * Storage Box 1 * English User Manual  "