Product description Size:1 pack Test lead resistance compensation for accurate low resistance measurements, Auto Hold function to "freeze" readings Auto power off rue Megohmmeter Insulation test voltage selections of 250V, 500V and 1000V EST LOCK feature for timed measurements up to 15 minutes Auto discharge after insulation test AC/DC voltmeter to 600VAC/1000VDC Product information Size:1 pack Technical Details Part Number 2126.53 Item Weight 0.16 ounces Package Dimensions 9.3 x 6.4 x 2.9 inches Item model number 6527 Batteries 6 AA batteries required. Size 1 pack Voltage 1000 volts Item Package Quantity 1 Batteries Included? No Batteries Required? No Battery Cell Type Alkaline