The Pioneer DEH-S4000BT CD receiver is a versatile addition to your car audio system. Compatible with both Apple and Android devices, it features built-in Bluetooth connectivity for hands-free calling and audio streaming. The receiver also includes a 1.5A USB port, aux input, and supports popular music apps like Pandora and Spotify. Its MIXTRAX technology gives your music a DJ-inspired twist, ideal for those who enjoy a continuous mix of tracks. The receiver's USB Auto Switch feature lets you choose whether to use your phone as a music source or simply charge the device. With support for FLAC codec, the receiver ensures high-quality audio playback, making it a superior choice for car audio enthusiasts.