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. Features: Multifunctional Universal Meter: including the functions of measuring DC voltage, AC voltage, frequency, resistance, continuity, V~Alert, and zero & fire line judgement. HD LCD Digital Display: 4 digits with maximum 2000 value display, LCD full display voltage, frequency, and analog bar simultaneously. Safety Operation: meet with CAT II 400V over-voltage standard, double insulation protection(II level), and full measuring range overload protection. Socket Live Wire Distinguish: non-contact AC voltage and live wire detection, with buzzer sounds and LED lights to indicate. Compact Thin Body Design: thin body design with compact portable size, which enhance the comfort of operation and convenient to carry around, the multimeter is suitable for handling the automotive and household electrical problems. Other Features: built-in LED flashlight for auxiliary lighting, large HD LCD display for clear reading, 2 minutes auto-off for saving power, data hold for conveniently read and record, and has low battery indication to remind you replace the battery. 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)