Fangrui Product Details 1. Fuyi Fy1881 High Precision Power Polarity Phase Socket Tester 2. Voltage Measurement (euuk Plug): 30v~250v 3. Voltage Measurement (us Plug): 30v~120v 4. Rcd Test (euuk Plug): 30ma 5. Rcd Working Voltage: 220v 6. Rcd (gfci Us Plug) Test: 5ma 7. Rcd (gfci) Working Voltage: 110v 8. Judgment Of Wiring Status: Seven Types 9. Display: Full Backlit Lcd Screen 10. Status Indicator: Red And Green 11. Date Storage: 20 Groups 12. Low Battery Indicator: Yes 13. Working Temperature: 0~40 Degrees Celsius 14. Battery: 2 X Cr2032 (not Included) 15. Quickly And Intelligently Measure Whether The Socket Connection Line Is Correct 16. Through The Full Backlit Screen, It Can Clearly Display Various Wiring Status Even In The Dark Environment, With Small Size And Light Weight, The Use Process Is Very Easy And Pleasant 17. Ac Voltage Can Be Accurately Measured And Displayed On The Screen In Real Time 18. Ac Voltage Measurement Range Is 30v-250v 19. Designed With Rcdgfci Test Button, One Key To Know The Working Status Of The Leakage Protector, Very Suitable For Protecting Your Safety From The Risk Of Electric Shock 20. Data Storage Function, Convenient To Record Voltage At Different Times Or In Different Environments, Can Store 20 Groups 21. Widely Used In Electrical Maintenance Testing, Office Socket Testing, Power Strip Testing And Wall Socket Testing In Schools, Laboratories, Factories And Other Social Fields 22. Weight: 86 Grams