1.There is a suction pump that can take tens of meters of gas from the outside to measure the instrument.
3.Large screen numbers, character display, instantaneous value, peak display
4.Self-test for display, battery, sensor, sound and light alarm function when booting or when needed
5.Safety Tip: Regular flashing, audible prompts
6.With charger, easy to carry and flexible to use
7.Low maintenance costs