Retro Design - a throwback design with modern features. AM/FM tuner - enjoy your favorite local radio stations with analog tuning. Bluetooth® Wireless Technology - allows you to sync your smartphone for wireless playback. Wired Capability - 3.5mm AUX input and 3.5mm headphone port. USB & SD ports - enable you to play your stored tracks. Built-in rechargeable battery - Built-in rechargeable battery keeps the music playing.