It helps you to measure the current and voltage values easily through the magnetic field formed around the cable.

For DCM310 and DCM320 

Option of current only , DCM310 or multimeter, DCM320 models
Measures up to 400 A a.c. with low current ranges for improved resolution
600 V a.c./d.c. DCM320
20 MΩ Resistance DCM320
Data Hold
Max Hold DCM310
Small pocket-size design
Exceptional battery lifetime
Supplied with carry case
IEC61010 CAT III 600 V

For DCM1500

DC and AC current up to 1500 A
True RMS measurement for greater accuracy
Large jaw size safely assists with uninsulated conductor measurements
750 Vac and 1000 Vdc
Resistance , continuity and frequency
Peak, min/max and data-hold functions

For DCM330

200.0 A a.c. open-jaw current measurement
0.1 V to 1000 V auto-ranging a.c. and d.c. voltage measurement
0.1 Ω to 20.00 MΩ resistance range
Continuity buzzer
Diode check
Non-contact detection of a.c. voltage
CAT IV 600V

For DCM340

DC and AC current and voltage
600 A and 600 V
Resistance and continuity
31/2 digit, 4000 count display with backlight
High resolution digital bargraph
Peak, min/max and data-hold functions
Zero-offset REL mode for comparative measurements
Supplied complete with test leads and carry case
IEC61010 CAT III 600 V

For DCM300E

Model/Option Selection Matrix