Pioneer MVH-S325BT Dual Bluetooth Multimedia Tuner will allow you to access the Pioneer Smart Sync app. This app allows you to access many navigation, communication and music streaming services from one user-friendly interface on your smartphone. Requires PSS app download. May require access to third-party services. Pioneer has beefed-up Bluetooth technology, allowing you to simultaneously connect and control 2 x phones in the car. That’s right, you can now connect 2 x phones via Bluetooth, at the same time and enjoy hands-free phone calls or music streaming. Even better, the auto connection function automatically pairs both phones so incoming calls from either of the paired phones can be answered.