【QC3.0 DUAL USB CONNECTION】Maximum charging power Support charging two devices simultaneously, one port is Quick Charge 3.0 port. 4x faster than standard charging efficiency, another USB port with music icons can be used as a charger and USB flash drive that can support up to 64g. 【FREE SPEECH】Powerful microphone with echo cancellation and CVC (noise cancellation) technology for clear calls. Seamless switching between incoming calls and music enhances security. 【WIDE COMPATIBILITY】The car bluetooth fm transmitter can be paired with all bluetooth-enabled devices in hands-free mode, such as iphone, ipad, ipod, tablet, samsung, htc, sony and other andriod smartphones. 【BLUETOOTH 4.2 LOSSLESS TRANSMISSION】Newly updated Bluetooth 4.2 fm transmitter technology provides more stable FM signal, better anti-interference performance, so you can enjoy your lossless transmission with music improved stereo. 【COMPACT DESIGN AND ROLLING STYLISH METAL】Oxidized apple ash sandblasted in surface and stylish metal knurling, eco-friendly ABS housing with matte finish, the FM transmitter fits your home perfectly. Thanks to the LED display, you can easily find it in the dark.