Wireless Bluetooth Speaker with T/F Memory Card, Aux In, USB with Built-in Mic Hands-free Port with Rechargeable Battery and inbuilt FM. It is compatible with laptops, MP3/4 devices, TF/USB Flash Drive, or any audio device that is Bluetooth compatible or has a 3.5mm jack input. With the Bluetooth, it sends good interference-free performance, high data rate, high quality and efficiency. It comes with a Built-In FM Radio to listen to your favorite radio stations and with the Rechargeable Lithium Battery included, you can have up to 5 hours of playing time. If you are playing your music and a call comes in, the music will stop and you will hear your phone ring and will continue playing after your call has ended.