Feature:1. [Durable Material] The product is made of high quality ABS material, which is durable, and the details are meticulously made, so you can use it with confidence.2. [High Accuracy] One key detection, accurate measurement data, and 20 sets of test results can be stored.3. [Test Function] This product is mainly used to test the polarity of the socket and RCD protection. It can also be used to test LIVENEU and NEUGRD voltage.4. [Easy To Use] This socket tester is easy to use, just plug it in and use it, it is practical and can meet your various needs.5. [Widely Use] This socket tester is mainly used for power value detection, and has a wide range of applications, such as living room, bedroom, office, etc.Specification:Item Type: Socket TesterModel: FY1811EUMaterial: ABSPower Supply: 2 x CR2032 3V (Battery Not Included)Application: Electric power value detectionWorking Temperature: 0-40Working Humidity: 20%-75%RHStorage Temperature: -10-50Storage Humidity: 20%-80%RHRCD Current: >30mAData Storage: 20 groups.Package List:1 x Socket Tester (Battery Not Included)1 x ManualNote:1. When the battery icon appears on the display, please replace the battery immediately to avoid wrong readings or damage.2. Before replacing the battery, make sure that the instrument is turned off and unplug the measuring circuit.3. Before using the RCD function, please unplug all electrical equipment or appliances on the test circuit and make sure that no damage or injury will occur.4. To verify whether the instrument is working properly, please plug it into a working socket first.