AC11 RCD NCV Tester Electrical Leakage Detector Socket Checker Ground Wire Zero Line Live Wire Phase Finder N09 US/UK/EU/AU Plug Features: AC11 Smart socket tester are mainly used to detect polarit of power socker and safety of leakage switch .It can quickly and accurately detect the wiring of the socket.Simultaneously,it can test socket voltage and show on the LCD display LED screen. Specifications: Brand Aideepen model AC11Smart socket tester Work voltage 2.6~3.3V Test voltage range 0.1V~250V/40~1kHz Work temperature 0 C~40C work humidity 20%~75%RH Stock temperature -10C~50C Stock humidity 20%~80%RH RCD current >30mA RCD work voltage 220V20V Battery 2*AAA Battery Does the package contain batteries without batteries Package List: 1 * AC11 Socket tester( without batteries) 1 * EU/AU/US/UK Conversion plug 1 * User Manual