Pacuwi Portable Stereo Bluetooth Speaker Multi-function with 4000mAh Power Bank Compatible for iPhone / Android Phones & PC & iPod & MP3 / MP4, Support FM Radio / TF Card Bluetooth V3.0+EDR Technology allows you to Connect wirelessly up to 66 feet (20m) away. Seamlessly stream and share music, movies, games, phone and conference calls anywhere. Premium Sound with Bass Enhance Technology. Two powerful 40mm Drivers deliver crisp clean sound with deep bass. Built-in Li-Ion Rechargeable Battery (4000mAH capacity)for up to 15 hours of playtime. A standard USB jack can be used as a power bank which can charge your phone or other device in emergency. Built-in microphone for hands-free speaker phone calling,hands-free speakerphone anwser your calls without delay, with FM function. Touch screen with FM Radio ,support Micro SD Card / TF card insert