Features: 1. It is easy to carry and can easily test whether your socket is safe. 2. Made of superior and durable materials, the service life is longer. 3. The function is powerful, and there are many types of faults that can be tested. Specification: Item model number: WH305 Product material: ABS material Product color: yellow Product size: 82.5*38*32mm Packing size: 100*40*30mm Product net weight: about 32g Product gro weight: about 45g Standard configuration: bare meter (no battery required) Power supply voltage: 110 (V) Measuring range: 110v Measurement accuracy: 1 Socket Safety Tester: It can easily test whether your socket is safe, and it is a good helper for the electrician! The new small electroscope, easy to carry, good workmanship and good hand feel, can be compared with non-general low-grade electroscopes! The following faults can be detected: open circuit of neutral wire, open circuit of live wire, open circuit of ground wire, reverse connection of live wire and neutral wire, reverse connection of live wire and ground wire, reverse connection of live wire and ground wire without ground wire, and detect leakage protector. Description: 1. Detect for 110V to 125V AC circuit; 2. Simple to use, plug directly into the socket; 3. Detect whether the third wire is connected incorrectly, that is, whether the ground wire, live wire, and neutral wire are connected incorrectly; 4. Detect whether the third wire is connected Wrong, that is, to see if the ground wire, live wire, and neutral wire are connected incorrectly Packing list: Socket Tester*1+Manual*1 Reminder: The size is measured manually, and there may be a slight gap; because of the different monitors and the shooting schedule, there may be color differences, and everything is subject to the actual product.