The Jensen DSP Amp app connects to compatible Jensen amplifiers via Bluetooth and controls most primary functions including: * EQ * X-OVER * RGB Light Customization * Volume * Gain Control * Frequency Adjustment * Remote Bass Control (XDA91RB only) Customize your sound by adjusting the integrated digital sound processor (DSP) in the amplifiers using the dedicated application on your smartphone. This app is compatible with the following Jensen models: XDA91RB / XDA92RB / XDA94RB / BOAUNO / JA4B / JA2B / JA1B The Jensen DSP Amp app connects only to the compatible Jensen amplifiers listed above. Do not download this app if you do not have a listed compatible amp as it will not work with any other amplifier.