POPOMAN MTM100B is a professional innovative laser measure with a USB charging function. It has a 2.25-inch LCD large back-illuminated screen and can be used indoors and outdoors. The built-in 850mAh lithium battery can be charged in 30 minutes and has a long battery life: 8,000 units of data measurement can be completed with one charge, so there is no need to worry about power. The rapid and accurate measurement requires only 0.5 seconds for data feedback. The automatic calibration error message improves work efficiency and helps avoid errors.