The 3-in-1 tester is combined with the function of multimeter, test pen, voltage meter, can measure DC voltage, AC voltage, frequency, resistance, continuity, V~Alert, zero & fire line judgement, and more, which is suitable for electrical device maintenance. Specifications: Color: Black Font / White Font (Optional) Material: ABS Safety Level: CAT.II 400V Range: Auto range Display: LCD Max. Display Value: 2000 counts Sampling Rate: Approx. 3 times/second Auto-off: Approx. 2 minutes Over-range Indicator: "OL" or "-OL" DC Voltage: 400V(0.8%+3), 0.01V resolution AC Voltage: 400V(1.2%+3), 0.01V resolution Resistance: 10M(1.2%+3), 1 resolution Frequency: 1000Hz(2.0%+3), 0.1Hz resolution Working Altitude: Max. 2000m Power Supply: 1 * 1.5V AAA battery (NOT included) Working Environment: 0~40 / 32~104, 45~80%RH Storage Environment: -10~60 / -4~140, 45~80%RH Item Size: 150 * 39 * 18mm / 5.91 * 1.54 * 0.71in Item Weight: 65g / 2.29oz Package Weight: 115g / 4.06oz Package Size: 16.3 * 7 * 2.7cm / 6.42 * 2.76 * 1.06in Packing List: 1 * Multimeter 1 * Lanyard 2 * Test Probe 1 * Manual (English)