... Number: M333Style: Ear HookCommunication: WirelessConnectors: USBUse: Mobile PhoneFunction: Bluetooth, Microphone, Noise Cancelling, WaterproofPlace of Origin: Guangdong, China (Mainland)Color: Blue, RedPackage: Color ... and voice quality effect9.Supports Bluetooth: Headset Profile, Hands-free Profile (DSP technology)10.Support Bluetooth stereo music playback11.Bluetooth 4.1 version, can be ...