Description: This socket tester is mainly used for power socket wiring detection and RCD test. It can detect the wiring status of the socket quickly and accurately. With LCD, it can also measure the voltage of the socket and display it. Features: 1. Plug and play, easy to operate. 2. The interface is clear and clear at a glance. 3. Small size, portable. 4. One-second detection, sensitive response, eliminate potential safety hazards. 5. RCD (Residual Current Device) function test. Specifications: ●Operating voltage:48-250V/45-65Hz ●Measure voltage (with LCD):48-250V/45-65Hz accuracy: ±(2.0%+2) ●Operating temperature:0°C~40°C ●Operating Humidity:20%-75% RH ●Storage temperature:-10°C~50°C ●Storage Humidity:20%-80% RH ●RCD test: >30mA (EU/UK Plug) ●RCD working voltage:220V+20V ●GFCI test: >5mA (US Plug) ●GFCI working voltage:110V±20V ●Note: RCD and GFCI functions do not coexist Package includes: 1*Socket Tester 1*User Manual