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 17. Built-in 4M memory chip, can about 90 pictures Module: MLX90640_CSB Using MLX90640ESF_BAB infrared sensor Resolution: 32x24 Temperature measurement range: -40~300 Measurement accuracy: +/-2C (central region, 0~100C) Working temperature: 10~50 Working humidity: less than 70% Refresh rate: 8HZ Field of view: 55x35 TFT size: 1.8 inches (display resolution: 160x128) Power port: USB Type-C 5V/1A Product size: 66x46x20mm Instructions 1. Charging: Use USB Type-C cable, 5V/1A 2. Turn on/off: Long press the middle button 4. Take a photo: press the middle button 5. Review photo: press up or down key 6. Exit the photo: long press the up or down key 7. Copy photos: Connect the computer with a usb cable, and the computer will get a disk. Note: You cannot change the photos in the disk or put other files into the disk connecting to the computer, fully charge and shut down. 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.