Ranges low 0-2000 ohm per square at 5 volts, mid 0-20 megohm per square at 500 volts and hi 0-2000 megohm per square at 1000 volts; 1 milliamp current limit; rechargeable batteries; automatic zeroing; 0 to 50 degrees c operating temp; wt 7.200 lbs with case, electrode and battery charging unit