The current clamp expands the functionality of digital multimeters and measures up to 400 amps for both AC and DC currents. The large clamp claw gives you access to difficult to reach areas. Features Battery-powered Hall-effect probe measures 1 to 400 A 1 mV/Amp output guarantees easy reading on your meter Take accurate current readings without breaking the circuit Maximum conductor 32 mm CAT III 600 V safety rating IN GOOD USED CONDITION SEE PICTURES FOR DETAILS