ANENG AC10 Socket Tester Plug Detector Zero Line Plug Polarity Phase Check Phase Detector US/EU Plug Multimeter Digital Tester Features: ANENG AC10 socket tester are mainly used to detect polarity of power socket and safety of leakage switch. It can quickly and accurately detect the wiring of the socket.Simuitaneously, it can test the socket voltage and show on the LED screen. Specifications: Battery 2*AAA Battery Does the package contain batteries without batteries Work voltage 2.6~3.3V Test voltage range 90V~250V/500~60Hz Work temperature 0 C~40C Work humidity 20%~75%RH Stock temperature -10C~50C Stock humidity 20%~80%RH RCD current 20%~80%RH RCD work voltage >30mA RCD work voltage 220V20V Brand ANENG Model AC10Smart socket tester Package List: 1 * AC10 Socket tester( without batteries ) 1 * User Manual