Amprobe AC1000 Digital Clamp-On Ammeter measures DC amps, volts, and ohms. It is a high impedance voltmeter and an ohmmeter. No connections are necessary when measuring current, the inductive pick-up simply clamps around any single conductor. It measures currents up to 1200A and can measure current in insulated wires. It permits measurements in live circuits, indicates current flow direction, and has a high contrast LCD readout. It also has a low battery indication.