Kingear Universal Hbs-740 Wireless Music A2dp Stereo Bluetooth Headset Universal Vibration Neckband Style Headset Earphone Headphone for Cellphones Enabled Bluetooth (Black) 1,High quality music bluetooth 4.0version headset 2,Support connection with 2 phones at the same time 3, Highly Enhanced Audio and Bass Response 4,Compatible with majority of smartphones or tablets with Bluetooth function