... processor control, charge testing auto conversion.2. Minimum resolution of current up to 1nA, zeroing by button pressing.3. Locking function ... of test current value, strong anti-interference ability.Specifications:1. Test Voltage: 1 ... 1000V. 3 ranges adjustable, and accuracy 1% + 3 digits2. Leakage Current Range: 0.1nA to 20.00m A, accuracy 1% highest ...