1. Test current from 0 to 500mA of 10 gears (15, 30, 50, 75, 100, 150, 200, 250, 300, 500mA).
2. Test leakage operating time range: 0~999ms.
3. The instrument is high accuracy, small in size and light in weight, easy to carry, especially suitable for on-site detection of leakage protector.