Bluetooth Speakers, Built-in Mic, Hands-free Calling, Support TF Card, Computer Speakers with the AUX Cable (included) for Apple, Blackberry, Nexus, Samsung and other Smart Phones, and MP3 Players Bluetooth wireless speaker  Bluetooth, support HSP,HFP,A2DP and AVRCP. The bluetooth range is 10 meters without any obstacle Warning tone reminding  With this function, you can clearly know the status about the speaker With 2*18650 rechargeable battery  Up to 8 hours playtimeThe volume will affect the time 5W speakers and enhanced BASS  Combined with resonator for High quality sound Support TF card, USB, AUX, and Hands free; volume up /downCH+/CH- controleasy and convenient to operate