Dual detection modes for metal and voltage - METAL detection mode: sweep the metal detection element parallel to the object to be measured. If a voltage loop is detected, the detector indicates the voltage. - Baseline setup: keep the object away, power on, and adjust slowly with the knob until the unit reaches a state of no sound and no light. This baseline is used for metal detection. - VOLTAGE detection mode: move the detection part (VOLTAGE) parallel to the object to be measured. When the detector is close to a metal object or a voltage circuit, it flashes. - Indicator behavior: the device uses light and sound to indicate detection. When there is no metal object or voltage circuit nearby, it does not flash or make a sound. After testing, please cut off the power. Important usage tips - Use the METAL mode to identify nearby metal objects by sweeping parallel to the target. - Use the VOLTAGE mode to detect proximity to metal objects or voltage circuits along surfaces, walls, or components. - Always return to a no-signal baseline before starting a new measurement by slowly adjusting the knob until there is no audible or visual output. - Ensure power is cut off after completing your test to conserve energy and maintain safety. Applications and use scenarios - Home renovation and construction: locate concealed metal pipes, studs, or fasteners behind walls or floors before drilling or cutting. - Electrical maintenance and troubleshooting: identify nearby metal objects or hidden voltage circuits to avoid accidental contact during wiring work or component replacement. - Electronics assembly and repair: detect buried or hidden metal components and assess proximity to live circuitry in equipment enclosures. Notes - Works through light to moderate proximity to metal objects or voltage circuits; indicators respond when within detecting range. - The device relies on its light and sound signals to convey detection status. If no object or circuit is nearby, there is no signal.