ALIBRO AJ-86 Portable Wireless Bluetooth Mini High-Def Sound Speaker with Bluetooth, FM Radio and 2 Alarm Clock Functions. (AJ-86 Black) Bluetooth hands free function.Support sleeping function,sleeping time range 5-90 minutes. MP3 playplay music directly from TF card. Built-in battery:rechargeable li-ion battery,environmental protection,energy efficiency and utility. Audio input:stereo sound input interface,easily connect to audio devices,such as computer,digital player,mobile phone,etc. Can charge to other mobile device:when the speaker is in charging,it can also charge to mobile phone or other device via USB transfer cable interface.