ZOpid ZDE658 4GB Wireless Rechargeable Headset with Bluetooth MP3 Player FM Radio Sporty behind-the-neck design for comfort and convenience - No Hassel of wires - Suitable for use during sports activities or use as a hands-free device while driving Announces the selected Headset Mode when Mode button is pressed - Built-in recgargeable battery Bluetooth Mode: Stereo Bluetooth 3.0 - Answer phone, listen to the music from phone or other Bluetooth devices - Radio Mode: Listen to FM radio - Supports Auto Channel Scan & Store function for easy radio listening Music Play Mode: Built-in 4GB flash memory to store music or other audio files in MP3 and WMA formats - 7 built-in preset Equalizer modes: Nature, Rock, Pop, Classical, Soft, Jazz & Heavy-Bass Directory/Folder change support - Use as a USB drive to save all kinds of data files - Compatible with Windows and Mac OSs