Note: If you meet the connect problem or other problem、 please contact us immediately、 we will help you to fix all problem. ThanksSpecification:Brand:AweiEarpiece Design:Earbud (In Ear)Compatible Brand:For Acer、 For Alcatel-Lucent、 For Amazon、 For Apple、 For ASUS、 For BlackBerry、 For Blackphone、 For CECT、 For CUBOT、 For Dell、 For Dopod、 For Firefly Mobile、 For Handspring、 For HP、 For HTC、 For Innostream、 For iRulu、 For Lenovo、 For LGFit Design:In-Ear OnlyModel:A920blMicrophone:SupportNoise Reduction:DSP、 CVC6.0Operating Frequency:2.4GHzWearing Manner:In-earCharging Time: about 1 hourTransmission Distance:5-10mFeatures:Echo Cancellation、 HD Voice、 Microphone Mute Button、 Noise Isolation、 Playback Controls、 Sweat Proof、 Volume Control、 Rain Water ResistantWireless Technology:BluetoothConnector(s):3.5mm JackMPN:Does Not ApplyEarpiece:Double