1、PLUG AND PLAY: Real time detection of current circuit safety, one key detection of working state of leakage switch protector 2、WIDE APPLICATION: Widely used to check and find the safety hazards of electrical outlets in homes, offices, factories and industries 3、EASY TO TROUBLESHOOT: There is a diagram of seven different modes of failure that is easy to compare and quickly identify the problem 4、VARIOUS PURPOSE: Electrical socket tester can be used as receptacle detector, phase detector, power polarity electroscope 5、STABLE AND DURABLE: Socket tester come with stable structure, excellent performance and long service life Item Type: Socket Tester Accuracy: ±(2.0%+2) Operating Temperature: 0℃~40℃ Operating Humidity: 20%-75% RH Storage Temperature: -10℃ to 50℃ Storage Humidity: 20%-80% RH RCD Test: >30mA GFCI Test: >5mA 1 x Socket Tester 1 x User Manual