Updated Features (As of 2020/11/03) Our product now offers the flexibility of selecting EU, US, or UK plugs, eliminating the need for adapters! Key Features: Automatic shut-down for enhanced safety Zero/Fire wire identification VA color anti-display screen for clear readings Non-contact detection capability AC voltage measurement up to 250V NCV (Non-Contact Voltage) Testing RCD (Residual Current Device) testing for extra safety Socket polarity testing Specifications: Brand: ANENG Model: AC11 Color: Black Material: Durable ABS Working Voltage: 2.6~3.3V Test Voltage Range: 0.1V~250V / 40~1kHz Operating Temperature: 0℃~40℃ Operating Humidity: 20%~75% RH Storage Temperature: -10℃~50℃ Storage Humidity: 20%~80% RH RCD Current: >30mA RCD Working Voltage: 220V±20V Battery: Requires 2 AAA batteries (not included) Size: 64.5mm x 64.5mm x 58.2mm (2.54in x 2.54in x 2.29in) Package Includes: 1 x Phase Meter 1 x English User Manual