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May 28, 2026 - 02:29 PM
Using the DEUS II remote underwater without the red cap subjects the unit to unbalanced external water pressure that compresses the flexible keypad membrane inward, leaving buttons unresponsive or stuck. It also presses the loudspeaker diaphragm against its housing, causing audio distortion or speaker failure. The red cap's pressure-balancing mechanism is essential for equalizing internal and external pressure during underwater detecting. Skipping it to avoid the cap-swap routine leads to expensive component repairs. For genuine replacement components, check out our full metal detector parts & accessories selection.
