What is the Smartbox? VAREX Smart Box is a control device with patent-pending technology that lets the user manually and automatically adjust the exhaust sound level of the Varex exhaust. Users can operate and make changes to the settings via an elegantly designed Smartphone App. The connections between the Smart Box and smartphones are via the latest Bluetooth® technology, which provides a intuitive user experience. SmartBox Precise manual adjustment of Varex exhaust valve positions Custom pre-set of Varex exhaust valve position Tune the Varex exhaust as fine as 1% increments Automatic control of Varex exhaust valve positions based on real-time information of RPM, throttle, and speed Automatic control of Varex exhaust valve positions based on the real-time GPS location of the vehicle For more information on SmartBox, CLICK HERE What's Included in the kit, SmartBox Control unit OBD ii Bluetooth adaptor GPS Antenna Varex remote connecting cable Download the Varex app from your devices app store