1. It is a professional socket tester with mini portable design, making it easy to carry and simple to use. 2. It can detect the wiring of the socket quickly and accurately. It can test socket voltage and show data on the LED screen simultaneously. 3. The high-definition display can help you see the screen value clearly in the dark environment.4. It can detect the wiring status of the socket quickly and accurately, making it widely used in the school, laboratory, factory and other social fields. 5. There are EU/UK/US plug, you can select corresponding plug according to the region of use. Note: Please check the product specifications carefully before purchasing the product. For example, in the United States, you can buy American plugs. When purchasing, please confirm that the plug specifications you need can be based on the plug specifications used in the local area to prevent unavailability due to purchase errors.