1.digital ammeter 2.Measuring range: -1999~1999 3.Delicate size 4. 3 1/2 digit LED display DK Series 3 1/2 AC Digital AmmeterMain Features:1)Default size : 48H*96W*80L mm or: 42H*79W*45L mm2)Compact size,stable performance2)3 1/2 digit LED display, range from -1999 to 19993)Sampling rate: 2.5 times / second, high accuracy4)Power supply:Default:220V AC optional for:48V AC/DC or 12~30V AC/DC