Professional Shock Digital Multimeter is a kind of convenient operation, accurate readings, complete function, small size, easy to carry and use battery as power handheld large screen LCD multimeter, for three and a half digital multimeter, the table can be used to measure dc voltage/current, ac voltage/current, resistance, capacitance testing, diode test, transistor HFE measurement and on-off circuit, etc. For engineering design, laboratory, production test, factory affairs, field operation and industrial maintenance use. The function of fault gear, as well as A superior performance over range protection against the burning protection (machine with insurance tube) automatic shutdown function better protect battery COMS integrated circuit, the principle of double integral A/D conversion zero self-adjustment, automatic polarity selection range scale. 1 - on-off test buzzer sound and light emitting diode instructions.