Excellent image quality: with infrared resolution of 256 x 192/49 152 pixels and thermal sensitivity <0.5 °C and 2 MP visual camera, the B20 thermal camera allows high resolution images with full screen temperature measurement (Max, Min, center point, custom 3 points), refresh rate of 25 Hz and a Temperature range from -4°C to 1022°F. 【4 Picture Modes & 5 Colorful Sheets】 Combined with 2MP visual light, the B20 offers four image modes (thermal, optical, fusion and PIP(picture in the picture) for different usage scenarios. The B20 thermal camera has a wide range of colours so you can choose the colour range that suits you for your task. Wi-Fi Connection Thanks to the built-in Wi-Fi and HIKMICRO Viewer, you can connect to mobile devices to stream your live devices on up to 3 tablets or mobile phones, better analyze temperature abnormalities on larger monitors and share real-time images. COMPACT DESIGN WITH EXTENSIVE FUNCTIONS An acoustic alarm and warning light remind you when the temperature is out of the range; LED work light allows you to reach dark and hard-to-reach areas; 16G eMMC flash memory has a capacity of >90,000 frames; Built-in Li-ion battery ensures continuous operation for up to 6 hours.