Features: Socket leakage detector, digital voltage/line detection/leakage detection/double insulation, digital voltage, easy to read. Comprehensive functions, factory equipment inspection, shopping mall circuit inspection, new house circuit acceptance, office circuit inspection line measurement. Leakage test protections function, under normal and correct circumstances, press the RCD leakage switchs test If tripping: leakage protections is normal, if no tripping: please contact professionals to line. Color screen digital display, the screen value can be clearly see dark environment, insulation and flame retardant safety protections, the housing is made of flame retardant materials, and the internal wire has high conductivity and less heat. Universal three-hole plug, easy to detect whether the circuit connection is correct, clear port at a glance, simple panel, quick to get started, suitable for factory equipment inspection, shopping mall circuit inspection, new house circuit acceptance, office circuit inspection. Specifications: Material: ABS Battery: 2x AAA 1.5V Batteries(NOT Included) Fire Voltage Range: 30-250V/50-60Hz Operating Environment: 0-40(Temperature), 20-70(Humidity) Size: Approx. 72x60x65mm/2.83x2.36x2.56in Note: Please allow 1-2cm errors due to manual measurement, 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: 1 Set Socket Tester