Heiyo Bluetooth FM Transmitter Radio Adapter Audio Receiver Stereo Music Player Dual USB 2 Port Car Charger Window Breaker Hands Free Calling Voice Navigation Input TF http://a.co/fuaiy04 This works great. It's very easy to set up and use, and the sound is clear. All the buttons and ports work great, and the window breaker brings peace of mind. The switch on the side allows me to avoid unplugging it all the time. Multi-purpose Design: The wireless in-car Bluetooth transmitter with emergency escape tool, supporting dual USB car charging, hands-free calls, data transmission by TF card and car battery voltage detection display Excellent Compatibility: Digital audio Receiver car Bluetooth stereo music player, FM transmitter works for cell phones, smartphones, iPhone, ipad, ipod, tablets and more, supporting for micro card and MP3, MP4 players Optimum Technology: The car music player comes with broken window device for emergency escape, hold the handle and push hard on the car w...