... Bluetooth Speaker for Mobile Phones,MP3,MP4,PSP,Laptop,Desktop X3 X3 Product Features1, Comply with Bluetooth 2.1+EDR2, ... Hand rope design , easy to carry Specification ParameterValueBluetooth Specification : 2.1+EDRBluetooth Profile : A2DP AVRCPRF Range :10 mFrequency Response :100Hz ... Hand rope Details show: X3 small speaker for bluetooth cell phone for Mobile Phones,MP3,MP4,PSP,Laptop,Desktop X3