Feature: 1. EASY DETECTION: Plug and play, one key detection. Can measure the current to measure whether the AC voltage of the socket is stable and normal use 2. CURRENT SWITCH: Adjust the 10A small electrical socket and 16A large electrical socket to switch 10A 16A, pull out the pin and rotate 3. COMPACT AND PORTABLE: Socket tester is easy to carry, more convenient storage, small size with large function 4. FAST AND ACCURATE: AC10 socket, tester is mainly used to test the polarity of the plug and the safety of the leakage switch. Can quickly and accurately detect plug wiring, and you can test the socket voltage and display on the LED display 5. SCRATCH RESISTANT ABS: Using excellent ABS material, possess impact resistance, scratch resistance, environmentally friendly Specification: Item Type: Socket Tester Material: ABS Color: Black Leakage Measurement: 10A 16A convertible RCD Current: >30mA Operating Temperature: 0℃~40℃ Working Humidity: Relative humidity 20%-75%RH Material Temperature: -10℃~50℃ Inventory Humidity: 20%~80% Relative humidity Battery: 2 x AAA battery(not include). Package List: 1 x Socket Tester1 x User Manual