The refresh rate is 8Hz, the target temperature measurement ranges is -40~+300, and the use environment is 10~50. 1.8 inch TFT screen resolution is 160*120, the screen shows the highest temperature, the lowest temperature, the center point. Using acrylic cover, which can better protect the tool and not easy to be damaged, with a long service time. Small in size and easy to carry, you can take it with you to anywhere you want to use it. No built-in battery, using USB power supplys mode, plug in and use it, very convenient and no need to wait. Infrared sensors: MLX90640ESFBAB/MLX90640ESFBAA Resolution: 32*24 Temperature measurement ranges: 40~300 Measurement accuracy: 2(Central point,20~50) Operate temperature: 10~50 Operate humidity: less than equal 70% Refresh rate: 8Hz FOV: MLX90640ESFBAB (55x35), MLX90640ESFBAA(110x75) Emissivity: 0.95 Power port: Micro-USB 5V Item size: 62 x 47 x 21mm / 2.4 x 1.8 x 0.9 inch Material:Acrylic+PCB Package Contents: 1 * 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.