Bluetooth Speaker Function: Recording, FM, TF, MC, USB Reader Chip: AK 1052 Built-in 800mA rechargeable battery JXD-X16 Portable Bluetooth Speaker AK 1052 Chip, Line-in / Voice Record / TF / FM / USB Port Function , 800mA Battery Bluetooth Speaker for iPhone w/ Line-in / REC / TF / FM / MIC / USB Reader