No calibration required Displays center point, maximum and minimum temperature Make photos (90 photos can be saved, connected to a computer, copied and deleted) Rechargeable battery, 210mAh Built-in 4M memory chip, can store about 90 pictures Module: MLX90640_CSB Using MLX90640ESF_BAB infrared sensor Resolution: 32x24 Temperature measurement range: -40℃-300℃ Measurement accuracy: +/-2℃ (central region, 0-100℃) Working temperature: 10℃-50℃ Working humidity: less than equal 70% Refresh rate: 8HZ Field of view: 55°x35° TFT size: 1.8 inches (display resolution: 160x128) Power port: USB Type-C 5V/1A Instructions 1. Charging: Use USB Type-C cable, 5V/1A 2. Turn on/off: Long the middle button 3. Take a photo: the middle button 4. Review photo: up or down key 5. Exit the photo: long the up or down key 6. Copy photos: Connect the computer with a usb cable, and the computer get a disk. Note:You cannot change the photos in the disk or put other files into the disk before connecting to the computer, please fully charge and shut down. Name:Thermal Imager Colour:Black Material:Plastic Package Contents: 1 x Thermal Imager Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.