More Accuracy - Measures DC/AC Voltage Tester to 600V, DC/AC Current to 200mA, resistance to 20M?, continuity to 50?, CE 600V CAT ?, you can troubleshoot a variety of automotive and household electrical problems accurately NCV Detector & Live Line Test- The NCV sensor is attached to the top of the current sensor. While the beeper will sounds alarms at different frequencies for detects the AC voltage. Electrical Tester. It detects the presence of voltage on conductors and wire in-wall without contact Continuity Test & Over Load Protection - Use the PTC protection circuit for Resistance, continuity sensor confirms that the circuit conducts electricity. If pen multimeter measured resistance less than 50?, the buzzer will sound, tell you the circuit issue quickly Auto Ranging - Pen multimeter design auto range and manual range, through test leads to measure the voltage current, more convenient for home circuits as well as at work Pockage Size for Easy carring - Easy to use with one hand, weighs only 0.30lb, carrying Bag can carry, suitable for home, factories, schools, cars and other electrical tester and maintenance