Maxbo In-ear Sport Waterproof Wireless Earphone, Bluetooth V4.1 Earhook Headphone with Microphone for iPhone7/iPad/Samung Galaxy/HTC/Sony Xperia/laptop/PC Smart Voice Control: Just say "Yes" or "No" to pick or reject a call, realize hands-free, extremely convenience for Drivers. Good Materials: the protective shell is made of aluminum alloy with straight grain brushed metal craft, and soft high elasticity PP plastic earhook brings you comfortable wearing experience. High Quality Stereo Sounds: Bluetooth 4.1+ EDR and APT-X technology ensure clear voice and more stable transmission signal Excellent Battery Performance: 85 mAh lithium-polymer battery supports 4 hours of music playing and 2 hour of talking at the cost of charging 1.5 hours After-sale Service: replace or refund unconditionally unconditionally within 30 days, 12 months warranty