1. Measuring range -40 to +300, 8Hz dynamic refresh rate 2. 2.8 screen resolution is 320*240; the screen can display and track the highest temperature, lowest temperature and center point temperature 3. The shell is made of FR4 epoxy sheet to better protect the internal components and has a long service life 4. Small size, easy to carry 5. Powered by lithium-ion battery. USB-C charging; up to 4 hours of battery life. Can be used while charging Built-in SPI Flash chip, can store 100 pictures. Connect a computer or mobile phone via a data cable to view and copy image files. Integrated design, no external equipment required. Infrared sensor: MLX90640ESF-BAB Hardware resolution: 32*24 pixel far infrared array Screen resolution: 320x240 pixels Temperature measurement range: -40 to 300 Measurement accuracy: 2 Working temperature: 0 to 50 Working humidity: less than equal 70% Refresh rate: 8Hz Field of view: horizontal 55 x vertical 35 Emissivity: 0.95 Charging specifications: USB Type-C5V/1A Product size: 85x55x30mm Battery: 3.7V 600mAh lithium-ion battery Working time:greater than equal 4 hours Colour:Black Material:plastic+metal Package Contents: 1 * Portable 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.