ANENG AC11 Digital Smart Socket Tester Voltage Test Socket Detector US/UK/EU/AU Plug Ground Zero Line Phase Check Rcd NCV test Features: ANENG 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 ANENG model AC11 Smart socket tester Work voltage 2.6~3.3V Test voltage range 0.1V~250V/40~1kHz Work temperature 0 C~40 C work humidity 20%~75%RH Stock temperature -10C~50 C 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