Features: [Multifunctional Design] This product includes a 3.5mm wired headphone and a BT 4.1 Receiver. You can uses the 3.5mm wired headphone and BT Receiver independently and discretely. You also can connect the 3.5mm wired headphone with BT Receiver to become a BT-enabled Headphone. [Magical Function] Turn the Traditional Speakers into BT-enabled ones. Advanced BT Chip ensures that you can enjoy your music and hands-free call from your Smartphone in high-quality sound. Talk with clarity: Hands-free calling with the built-in microphone makes catching up with friends a breeze. Wide Compatibility: Compatible with most BT-enabled electronics such as, Smart Phones, Laptop, Tablet PC, MP3 Player, etc. supporting Automatic Re-connection, ideal for home or vehicle audio systems. [Strong Wireless Signal Multipoint Technology] With a wireless audio range of 33ft(10m), enjoy the freedom to move and the convenience of uncompromising sound quality. And can simultaneously connect two smarts phone. So you can seamlessly switch between your business and personal phones. [Convenient to use] Equipped with function buttons for Easy Operation and supports Voice Prompt(Including Chinese, English and Korean) which lets you easily to operate the headset and control your music call. It also supports hands-free with built-in mic, thoroughly setting free your hands from answering the call during exercise. [Professional Sport Design] Sweatproof design, Light and Portable. Its earbud's design is based on the outline of human ear which guarantees Stable and Comfortable to wear when walking, exercising, running, cycling, fishing and other outdoor activities.