The Klein Tools NCVT1 50V to 1000V AC Non-Contact Voltage Detector Pen is a reliable and efficient tool for detecting voltage levels. With its electric measuring technology and LED indicator, you can easily and safely test for voltage in a clip conveniently attached to your pocket. Made of durable plastic and polycarbonate materials, this voltage/continuity tester by Klein Tools is compact in size and lightweight, making it a practical choice for various electrical testing needs in the home, workshop, or garden.