Socket finder with LED display, used to quickly detect whether socket wiring is correct The RCD socket tester can help you measure the socket voltage and frequency, which are clearly displayed on the LCD screen. The shell of the digital socket tester is made of ABS material, which is strong and wear-resistant, not easy to break, and can be used for a long time. The electrical outlet tester can be widely used in electrical maintenance testing, desktop outlet testing, power board testing, and wall outlet testing in social areas such as homes, businesses, etc. schools, offices, factories, etc. Voltage tester is portable, small in size, easy to store and use, and does not take up too much space The socket tester is used to quickly detect whether the wiring of the socket is correct. It has an easy to read LED to indicate the status of the socket. It can test the protection system to ensure the safety of household electricity. Features -Color: as shown. -Material: ABS. -Size: 6.5x5.5x6.3 cm / 2.56x2.17x2.48 inch. -Plug Type: EU. Measuring voltage range: 90-250V / 45-65Hz. Precision: Plusmn; (2.0% + 3). Working temperature: 0-40. Working humidity: 20%-75% RH. Storage temperature: -10-50. Storage humidity: 20%-80RH. Altitude: 2000 meters. RCD current: 30mAh. RCD working voltage: 220V PlusMN; 20V. Package including 1 * Digital Socket Tester