QCY Mini Bluetooth Invisible Handy Headphone with Mic and Voice Ultra-long Stand-by Time - White Mini size and light weight, elegant appearanceBluetooth 4.1 technology, stable connection and low power consumption Noise isolation lets you enjoy high quality clear soundThe built-in microphone enables hands-free phone callSupports voice prompt for incoming callsOne button for multifunctional control - on/off, answering/hanging up callCan connect with two mobile phones at the same timeErgonomic design with multi-angle adjustment for comfortable and stable wearingBuilt-in li-polymer rechargeable battery for convenient useCertified by CE, FCC and RoHS