Feature: 1. EASY DETECTION: Plug and play, one key detection. Can measure current to measure whether the AC voltage of the socket is stable and normal use 2. CURRENT SWITCH: Adjust the small 10A electrical socket and the large 16A electrical socket to change from 10A to 16A, remove the pin and turn 3. COMPACT AND PORTABLE: The socket tester is easy to carry, more convenient storage, small size with great function 4. Fast and accurate: AC10 socket, the tester is mainly used to test the polarity of the socket and leakage switch safety. Can quickly and accurately detect the wiring of the socket, and you can test the voltage of the socket and display it on the LED screen 5. SCRATCH-RESISTANT ABS: Using excellent ABS material, has impact resistance, scratch resistance, eco-friendly Black Voltage measurement: 90-250V, 50-60Hz Leakage measurement: 10A 16A convertible Operating current: RCD 220V20V RCD current: >30mA Operating voltage: 2.6V-3 .3V Test voltage range: 0.1V-250V, 40-1KHz Operating temperature: 0-40 Operating humidity: relative humidity 20% to 75% RH Material temperature: -10-50 Humidity Inventory: 20% - 80% relative humidity Battery: 2 x AAA batteries (not included) Package List: 1 x Socket Tester 1 x User Manual > Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.