Enhance your audio experience with the DS18 MBKR Marine Gain Attenuator. This universal waterproof RCA line level control allows for remote volume control on any head unit, giving you complete command over your sound system. Whether you want to fine-tune the bass or adjust the levels in different zones, this line level control has got you covered. With its convenient one-hole mounting method, installation is a breeze. Simply attach it to your dashboard and enjoy easy access to precise sound adjustments. Plus, its waterproof design ensures reliable performance even in wet environments like boats, jet skis, or ATVs.• Universal bass knob• Compatible with any source unit• RCA input and output• Flush mount• Water-resistant IP65 Convenient one-hole mounting method for easy installation Waterproof design ensures reliable performance | MKBR Marine Gain Attenuator