1、The alarm mode adopts sound and light alarm which is able to alarm you in time 2、Adopt inductive testing without physical contact, easy to operate. 3、This testing pen can check the voltage on the control wires, conductors and sockets or check the wire break position along the wires. 4、It can be used in dark environment or under night, the lighting and the probe are combined into one, which is convenient for measurement and more worry-free. 5、Suitable for testing household appliances and industrial electricity Features: 1. The alarm mode adopts sound and light alarm which is able to alarm you in time 1. Adopt inductive testing without physical contact, easy to operate. 2. This testing pen can check the voltage on the control wires, conductors and sockets or check the wire break position along the wires. 3. It can be used in dark environment or under night, the lighting and the probe are combined into one, which is convenient for measurement and more worry-free. 4. Suitable for testing household appliances and industrial electricity Specification: Condition: 100% Brand New Frequency: 50HZ/60HZ Alarm Mode: sound and light alarm Operating Temperature: 0-40℃ Storage Temperature: -10-50℃ Size: Approx. 156 * 20mm / 6.1 * 0.8in Package List: 1 * Non-Contact Voltage Detector Pen