Garrett ACE 400i Metal Detector. The Garrett ACE 400i is a professional metal detector designed for reliability, accuracy, and precise control in all search conditions. It is ideal for finding coins, jewelry, relics, and other valuable metals. Features include adjustable frequency to reduce interference, Digital Target ID (0-99), All-Metal mode for accurate pinpointing, Graphic Target Analyzing for real-time target analysis, and Iron Check for precise iron discrimination. ACE 400i Iron Audio lets you hear muted iron signals to identify unwanted targets. Lightweight and ergonomic, it ensures stable, comfortable operation for efficient treasure hunting.