Measures internal resistance of batteries. Automatic calibre. Voltmeter: AC / DC 0 -- 600 V. Ammeter: AC / DC 0 -- 400 mA. Ohmmeter: 0 O -- 40 MO. Continuity and LED test. Temperature measurement. Cyclic ratio: 5% -- 99% . Cam angle. Tachometer. Frequency meter: 1 Hz -- 400 KHz. Compatible with clip-on ammeter Ref 711A.P500.