Features:Built-in rechargeable lithium battery, -USB interface, you do not need to worry about the power. The refresh rate is 8Hz, the temperature measurement - is -40~+300, and the use environment is 10~50.The emissivity can be adjusted from 0.1 to 0.99 range.Sensor probe field angle, default 55 x 35 degrees MLX90640esf-bab version.2.4 inch LCD screen resolution is 320 x 240, the screen shows the highest temperature, the lowest temperature, the center point temperature, displays each coordinate point. Two color modes can be : iron red and rainbow.With photo taking function, built-in memory, you can take 100 photos, without using other tools, use -USB cable to connect directly to the computer, you can browse, copy, delete pictures. Can be applied to human body temperature detection, PCB component heating temperature detection, floor heating temperature detection, automotive parts temperature detection, electrical switch temperature detection, air conditioning and oven detection, etc. Specifications: Resolution: 32 x 24 Temperature measurement range: 40~300 Measurement accuracy: 2 (center area, 0~100) Working temperature: 10~50 Working humidity: 70% Refresh rate: 8Hz No calibration required Sensor field angle: 55 x 35 degrees Emissivity: 0.1~0.99 adjustable Display center point, highest and lowest temperature Battery: 1 x lithium battery, 750mAh (included) Use time: 4h Recharging time: 1.5h Power : -USB 5V/1A size: 87 x 53 x 20mm / 3.4 x 2.1 x 0.8 inch Material: ABS colour: blue Package Contents: 1 x MLX90640 Thermal Imager 1 x USB Cable 1 x Lanyard 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.