The large clear digits of the numeric display are complemented by a high-resolution digital bar graph, useful for trending and indicating fluctuation in measurement. The back light assists use in poorly lit areas such as distribution cupboards and corners of switch-rooms; and the data-hold feature enables use on difficult access cables, where otherwise the display may be impossible to see.Safety rated to IEC 61010-1 CAT IV 600 V, the DCM1500 Measures up to 1500 A ac or dc and it offers 750 Vac and 1000 Vdc ranges making it ideal for use in the installation, maintenance, monitoring or checking of large ac or dc electrical systems and equipment. Dimensions 105 mm (W) x 275 mm (L) x 48 (H). Power Supply 1 x PP3 MN1604 6LR61 alkaline cell. Battery Life: 100 Hours. Drop-tested to 1.2 m onto a Hard Floor. DC and AC current up to 1500A. True RMS measurement for greater accuracy. Large jaw size safely assists with uninsulated conductor measurements. Maximum conductor size: 51 mm 750 Vac and 1000 Vdc. Resistance , continuity and frequency. Peak, min/max and data-hold functions.