Bluetooth Speakers,AEDILYS HIFI DTS-HD Technolog Portable Wireless Bluetooth Speaker Stereo (Black) all in one 2.1 channel soundbar with 3d surround sound. built in battery rechargeable li 2200 mah,Playing time: 8 hours (normal volume) bluetooth remote control 10M (33 ft - no obstacles such as door , wall) bluetooth, support tf card, usb, fm radio, line display led exposure time, wake up,function clock, line, fm radio, the state of charge, bluetooth and so on. support of hand when answer call (with microphone),support of the phone and the phone number and reporting function