EDUP Portable Wireless Audio Receiver with Built in Microphone Car Kit Wide compatibility: Bluetooth 4.0 Receiver compatible with most smartphones and Bluetooth electronics; ideal for home or vehicle audio systems Enjoy music:you can listen to music from your phone, laptop or iPod without the hassle of cables Use it for longer:8 hours of talk and play time, or up to 200 hours on standby Talk with clarity: Hands-free calling with the built-in microphone makes catching up with friends a breeze Wide range:up to 33ft(10m) connection distance,enjoy your music more freely