bluetooth speaker 1) Hand free phone call 2) 3W ,10 meter tramsmit 3) Bluetooth 2.1 ... for iphone 4,ipad ,imac ,mp3/mp4 player Description:Model Number:YF-H-140Compatibel with:iPhone,iPad, table pc, notebook etc ... V2.1+EDRBluetooth profile: )<10M( According to environment and mobile phone Bluetooth device, transmission range have some different)USB charge voltage ...