The Pioneer MVH-S325BT is a single-DIN digital media receiver known for its smartphone connectivity and dual Bluetooth technology. It is designed for modern drivers who primarily use their phones for music and calls, as it does not include a CD player. 
Key features
Dual Bluetooth: Connect two phones simultaneously. You can stream music from one device and manage hands-free phone calls from another, or answer incoming calls from either paired phone.
Pioneer Smart Sync App: This mobile app integrates with the receiver to control navigation, music, and communication from one user-friendly interface on your smartphone.
Spotify Control: A dedicated audio source on the receiver's menu allows you to browse and control the Spotify app on your phone directly from the head unit via USB or Bluetooth.
Voice Control: For iPhone users, Siri Eyes Free allows for voice-activated commands to make calls, select music, and listen to messages, helping you keep your eyes on the road.
Multiple Audio Inputs: Connect devices via the front-facing USB port (which also provides charging) or the AUX input.
Quality Sound: The unit features a built-in MOSFET 50W x 4 amplifier and includes a 13-band graphic equalizer for detailed sound adjustment. It also supports FLAC lossless audio file playback for high-quality digital sound.
Expandable System: An RCA pre-out allows you to connect an external amplifier for additional speakers or a subwoofer.
Detachable Faceplate: For security, the faceplate can be removed and stored in the included microfiber bag.