M89B Sensor Pen Test LED Light for Checking Home Appliances with LED Light and Digital DisplayOOTDTYoottyFeatures: AC Circuit Tester Light Detector is only for indoor use and to avoid strong light. The measuring range is 12-250v, safe and accurate. The test pen has two kinds of applications, one for measuring the electrical circuit and the other. This tester is made of plastic, insulating, sturdy and . This tester provides U detection of wires, circuit breakers, light fixtures, switches, sockets and wires. Specification: Material: Plastic & Metal Total Length: 12.8CM/5.04in Length of Metal Head: 0.3x2.2cm/0.12x0.87inchesPackage Included: 1 x Non-Electric IndicatorNote: Please allow 0-1mm errors due to manual measurement, please make sure you do not mind before ordering.