Mepro Sport Portable Wireless Bluetooth Speaker, Portable Outdoor Sport Stereo Bluetooth Speaker with Dual Speakers/NFC Compatible with most Bluetooth-enabled devices: Including Apple, iPhone, and iPod, most Android devices and other smart devices for simple wireless audio streaming Built-in rechargeable 3.7V, 1200 mAh lithium-ion polymer battery: Provides extended playback, enables you to stream music for up to 6 hours on a full charge NFC(near-field communication) technology: Allows simple, one-touch pairing Provide a bicycle bracket when you Cycling for outdoor,More convenient to enjoy music It can use as home Portable Speaker too