Bjht-1 is popularly used for quality inspection company to make supervisory monitoring, random monitoring, on-the-spot testing, and also used for sampling and laboratory center. No need to manual calculation. Machine automatically compute and show result. Features: smart design; convenient to carry; true color lcd display screen. Easy to operate and make your work efficient. the voice function allows testing personnel not to see the value and improve test Efficiency. usb interface, easy to connect with pc. No need to install any drive program. advanced low power consumption; working more than 16 hours;