Earpiece Design:Earbud (In Ear)Compatible Brand:For Samsung、 For Apple、 For HTC、 For Lenovo、 For LGFit Design:Ear-HookFeatures:Answer/Hang up/Rejection Calls、 Bluetooth Wireless、 Built-In Microphone、 Rechargeable、 Sweat Proof、 Volume ControlWireless Technology:BluetoothEarpiece:Double