Special Features:

2 inch speaker; adjustable volume control; led for visual signal strength indication; recessed tabs for telephone test or headset construction; 9v battery operated; one-button operation

Properties:

An item specifically designed to indicate the presence of alternating current, pulsating direct current and/or static electricity by detecting the electrical field surrounding the object, such as a power line being tested without making physical contact. The method of indication may be audiable, such as a high pitched tone and/or visible, such as a flashing light(s). For items designed to indicate by physical contact with the object being tested, see indicator, line voltage.