830 series multimeters are pocket-sized 3 1/2-digit digital multimeters for measuring DC and AC Voltage, DC Current, Resistance and Testing Diode. Some models also provide transistor test function, signal output or performing continuity test GENERAL SPECIFICATION Display: 3 ½ digits LCD with a maximum reading of 1999 Polarity: Auto polarity indication. Overrange indication: Only digit "1" on the display. Operating environment: tempetature 0 ~ 40°C; relative humidity<75%. Storage temperature: -15°C ~ 50°C; relative humidity<90%. Battery: 9V 6F22/1.5V × 2 AA (for DT830BL only) Low battery indication: or "BAT" appears on the display. Dimensions: 139mm 78mm 40mm Weight: 170g Power consumption: 20mW