Features:  Built-in rechargeable lithium battery, Micro USB interface, you do not need to worry about the power.  The refresh rate is 8Hz, the target temperature measurement ran-ge is -40~+300& 8451;, and the use environment is 10~50& 8451;.  The emissivity can be adjusted from 0.1 to 0.99 range.  Sensor probe field angle, default 75 degrees*110 degrees MLX90640ESF-BAA probe.  2.4 inch LCD screen resolution is 320*240, the screen shows the highest temperature, the lowest temperature, the center point temperature, displays each coordinate point.  Two color modes can be selected: iron red and rainbow.  With photo taking function, built-in memory, you can take 100 photos, without using other tools, use Micro 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 microwave oven detection, etc.    Specifications:  Material: ABS  Color: blue+red  Resolution: 32*24  Temperature measurement range: & 8208;40& 8451;~300& 8451;  Measurement accuracy: ±2& 8451; (center area, 0~100& 8451;)  Working temperature: 10& 8451;~50& 8451;  Working humidity: ≤70%  Refresh rate: 8Hz  No calibration required  Sensor field angle: 75° * 110°  Emissivity: 0.1~0.99 adjustable  Display center point, highest and lowest temperature  Color modes: iron red, rainbow  Battery: 1 * lithium battery, 750mAh (included)  Use time: 4h  Recharging time: 1.5h  Power jack: Micro USB 5V/1A  Item size: 87 * 53 * 20mm / 3.4 * 2.1 * 0.8in  Item weight: 58g / 2.0ounce  Package size: 135 * 70 * 30mm / 5.3 * 2.8 * 1.2in  Package weight: 105g / 3.7ounce    Note:  it is recommended to fully charge the thermal imager before connecting it to the computer, and then connect to the computer after shutting down.    Package list:  1 * Thermal Imager  1 * USB Cable  1 * Lanyard