Description: With its good performance, this socket tester can measure voltage, polarity and phase with high accuracy, which is very convenient. Besides, it is very safe which can effectively prevent leakage, so you can use it with confidence. Designed with a digital display screen, this socket tester makes it easy to read data. Also, it is designed with backlight, which can well assist you to work at night. It is constructed of ABS material. The length of this product is 7.18cm, the width is 7.1cm and the height is 7.1cm. It is a useful tool for testing electrical outlets in homes, offices, schools, factories, etc. Item Name: Socket Tester Material: ABS Features: Plug-and-Play, Multifunctional, Leakage Protection Operating Voltage: 2.6 to 3.3V Test Voltage Range: 220v~240v/50~60hz Working Temperature: 0 Degree Celsius to 40 Degree Celsius Working Humidity: 20 Percent ~75 Percent Rh Storage Temperature: -10 Degree Celsius to 50 Degree Celsius Storage Humidity: 20 Percent ~80 Percent RH Rcd Current: More Than 30mA Rcd Working Voltage: 220V Minus or Plus 20V Power Supply: 2 x AAA Batteries (Not Included) Socket Type: EU Plug Size Details: 7.18cm x 7.1cm x 7.1cm/2.83" x 2.8" x 2.8" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Socket Tester