Bluetooth Speakers,Outdoor Portable Wireless Stereo Bluetooth Speaker Built-in FM Radio Hands Free Speakerphone TF Card Slot With Rechargeable Battery Support 6 Hours Playtime (Black) New bluetooth version 4.0,easily pair with any bluetooth devices. With convenient sling to carry it for outdoor occasion. Rechargeable battery support up to 6 hours playing time at 70% volume. Featured in FM radio,hands free speakerphone,TF card mp3 play. Volume adjustable on speaker or your device, control button to take photos if connected to an iPhone.