EGRD Upgrade Version Apt-X Bluetooth 4.0 Wireless Sports Stereo Headsets , Part Support Voice Control Function Music Earphones, Universal Neckband Headphones for Smartphones (Blue) TheupgradedearphonehasBluetooth4.0. Chip: CRS 8635. Supports the Apt-X Technology. It saves more power and provides high-fidelity and stereo music. Itsexceptionallylightweight,comfortable,flexible,andlightneckbandthatismadeofultra-lightshapememoryalloy.Eliminatesthetanglewiresthatdriveyoucrazy. Thenewlyaddedvoicecontrolfunctionmeansyouneedtopressthevoicecontrolbuttononyourphone,andspeakingwiththeearphone,itsupportsvoicecontrol.Notordinaryhands-freecall. Vibrate function . Only the left side of the earphone will vibrate when someone is calling you. Thebasicfeaturesarelongtalk/play/standbytimesupto15/10/500hours.Thiswillconnectautomaticallywithaphonepairedpreviously.Thewirelessrangeis10meters.