General description Compact and lightweight design for convenient use. Detects correct connections of neutral, live, and ground wires, indicating any missing wires with clear light patterns. Shockproof ABS shell enhances durability and practicality. Equipped with a bright LED light for use in dark environments, making test results easy to read. Features 7 LED light patterns to indicate measurement status: Correct, Open Ground, Open Neutral, HOT/Neutral Reverse, HOT/Ground Reverse, Open Hot, Live Neutral Reverse.