... 1.Black Mini Bluetooth V2.1 Stereo Headset Headphone 2.Bluetooth 2.1 3.CE ... Latest design Black Mini Bluetooth V2.1 Stereo Headset Headphone for Iphone 4,4s,5,Ipad,PC ... reference: Specifications of bluetooth: Bluetooth VersionV2.1TypeStereo headphone with internal micOperation Distance10mRange of Frequency2.4 to ... Latest design Black Mini Bluetooth V2.1 Stereo Headset Headphone for Iphone 4,4s,5,Ipad,PC, ...