Identifies UK 13A mains socket wiring faults. Durable design with 3 LED indicators. Instant socket safety test without the need for a multi-meter. Indicator LEDs identify: correct wiring; live and neutral reversed, live and earth reversed; no neutral, no earth and no live wire. Includes instructions. Certified to BS EN 61010, 61326, 61000 and 50581 applicable standards. Only suitable for UK 13A mains sockets.