Wireless Bluetooth Speaker with Rechargeable Battery‎.‎ 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 you favorite radio stations‎,‎ you can have up to 6 hours of playing time‎.‎ Did we mention it comes with a Built‎-In Microphone‎?‎ The Microphone will allow you to make and receive Hands‎-free calls and listen to the other person loud through the Wireless Bluetooth Speaker‎.‎ 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.‎