Suitable for use on 70 - 250Vac/250 Vdc (direct contact). Voltage test non-contact 70 - 10000 Vac. Continuity test 0 - 50 MΩ. Polarity test +/- 1.2 to 36 Vdc. Microwave leakage detection >5mW/cm². Safety barrier 16 MΩ resistor. Powered by 2 x 1.5V battery