The secure fit ensures it won't slip or interfere with your detecting

If you're not comfortable with electronics repair

Just soak it in cool water for 10-15 minutes before your first use

repeating mid-tones

Teknetics Delta 4000 Metal Detector w/ 11" DD Double-D Coil & 5 Year Warranty (Open Box) drive-unit The secure fit ensures itOpen Box Teknetics Delta 4000 Metal Detector with 11 DD Search Coil, and a Five Year Warranty. The Delta 4000 features Numeric Target ID, Multiple Notches, Pinpoint, Running Depth Display, 2 Search Modes, and Overload Alarm System. Open Box Teknetics Delta 4000 Metal Detector w 11" DD Double D Coil & 5 Year Warranty. The Teknetics Delta 4000 metal detector comes with these features Features Numeric Target ID Multiple Notches Pinpoint Running Depth