... 6788General Description: MT-921 is 3 1/2 digital clamp meter with steady performance, safety and reliability, full function. The ... are SMD surfaced. And all the range positions have overloading protection function, not easy to damage. AC current is measured through ... test AC Voltage,DC Voltage,Resistance,Diode and continuity. The meter has “SELECT/HOLD” key for function selection and reading,recording ...