Bluestream's BS301HPBT Bluetooth Stereo Headphones are compatible with any Bluetooth device as well as devices with a 3.5mm headphone jack. Compatibility includes: all iPhones, iPods, Smartphones, iPads, Tablets, MP3 Players, Computers, & More. These headphones feature a built-in rechargeable battery for hours of listening time. A built-in microSD card slot allows for listening to MP3 files from a microSD card. Also featuring a built-in microphone for safe and easy hands-free calling, as well as integrated controls for Changing Music Tracks, Starting & Stopping Playback, as well as Answering/Ending phone calls.