Android Music Support Users of devices running Android OS version 4.0 or later can connect to the DEH-S1200UB and listen to music stored on the device without the need for an app. The process is made possible using Media Transfer Protocol (MTP), which allows the receiver to recognize the Android smartphone as a music storage device. Operate basic functions like FF, REW, Play, Pause, Random Play, and Repeat and view Metadata information such as track, artist, and album name. Keep The Party Going! MIXTRAX® is an innovative Pioneer technology that creates a nonstop mix of your music library complete with a range of DJ-inspired effects. Drawing from Pioneer’s rich DJ heritage and our passion for music, MIXTRAX delivers a unique DJ infused listening experience to those in the car. MIXTRAX takes the music from a USB device and plays it back with added transitions and effects, creating a virtual DJ inside the Pioneer receiver. MIXTRAX makes automatic remixing of tracks extra quick and easy. Simply connect your USB compatible device and listen as tracks are joined by various random sound effects in nonstop mix play to keep the groove going in full swing. MIXTRAX also features club-style illumination that enhances the mood with a dynamic dance club-like lighting effect. As MIXTRAX begins, lights start pulsing to the beat of the music, adding an extra level of entertainment. Choose among multiple patterns of lighting variations from sound pressure level or low-pass synchronization modes. USB Auto Switch The receiver also includes the USB Auto Switch feature so when the phone is connected via USB the listener has the option to choose whether the receiver uses the phone as a source, or just charges the device.