Features: 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. The LCD backlight display can be clearly illuminated in strong sunlight. It can also be used in the dark. It allows you to read quickly and clearly. Specifications: Material:ABS Color:Black Test Voltage Range:90-250V/50-60Hz Working Current:RCD 220V20V RCD Current:30mA Battery:2x AAA Battery(not included) Option Type:US Plug Tester; EU Plug Tester; Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Socket Tester