Hrph A10 Wireless Bluetooth Speakers LED Metal Steel Mini Portable Speaker Smart Hands Free Speaker With FM Support SD Card A10 Wireless Bluetooth Speaker Support Answer Calling and TF Card Support TF card(micro SD TF card)with TF card slot,can play MP3 format files in the TF card Support Mobile Phone/Laptop/Tablet PC Larger 45mm driver delivers precise highs for superb sound Built in rechargeable battery,charged by computer via USB interface