The High Accuracy Low Current Clamp Meter, No. 683, from Electronic Specialties was developed with new circuitry designed to maximize low current accuracy and zero stability. The clamp is able to measure parasitic drains accurately, efficiently, and with dependable/repeatable readings. It features a 1mA low reading resolution and can read up to 60A. The 16mm x 18mm clamp opening is large enough to clamp over most negative battery cables. The 683 reads both DC and AC currents, and it detects the current automatically. The clamp can also record up to 99 records for recall later. Unit comes with zippered storage case, manual, and 9V battery.