Non-Contact Safety Voltage Testercan be tested without physical contact. The buzzer and flashing light remind at the same time and increase the safety factor. Insulation operation ensures safety testing. Automatically differentiates between zero line and live line, also suitable for detecting line break in 110V and 220V power system. 9 levels of sensitivity to choose from. The voltage range is 12-1000 VAC. During use, the probe's NVC sensor automatically detects the voltage intensity. The meter activates the corresponding signal strength indicator based. Low voltage display If the battery voltage is lower than about 2.6V, the operation display will flash three times and the buzzer sounds and turns off automatically. Please replace the battery. Auto Shut-off & Handheld Stylus Hook After about 3 minutes without operation or signal detection, the voltage detector will automatically shut down to extend battery life and save energy. With the handy portable pencil hook, you can easily remove and carry it. ENTERTAINMENT FOR CATSThe exciting laser moves randomly on floors and walls, appealing to the natural hunting instinct of cats; press the button to control where the laser points.