Features: 1. Non-contact voltage detection 2. Adjustable sensitivity 3. Flashlight function 4. Triple sound and light alarm 5. Voltage level display 6. Powered by two AA batteries (not included) Dimensions: 155 mm x 21 mm x 26 mm Net weight: about 0.048 kg [Non-contact testing] This electrical tester uses an NCV inductive probe for non-contact AC voltage detection. Simply bring the tip of the voltage tester close to the terminal to detect the presence of current. [Practical design] This professional electrical tester is equipped with an LED flashlight, a low battery indicator, an automatic shutdown function, and a pen clip. It is an essential tool for everyday use. [Voltage Alarm] The tester detects different voltage levels: a red signal accompanied by a rapid beep indicates high voltage, while an orange signal accompanied by a slow beep indicates low voltage or voltage close to neutral. It can also be used as an electrical continuity tester for basic diagnostics. [Analog Display] This voltage tester features an analog display for visual indication of voltage levels. This allows you to quickly assess the severity of electrical hazards present in your circuit.