Bluetooth FM Transmitter Adapter for Car, P-JING Wireless FM Modulator Aux Car Kit Radio USB Car Charging and Hands-Free Calling for iPhone, Samsung, LG, HTC, Nexus,Sony Android Smartphone Bluetooth Function: Connection to the Bluetooth device, monitoring the audio messages on your cell phone's Car Navigation APP, answering or hanging up phone calls on call phone. ALL of these will make your driving a fun and more secured. Play GPS with Bluetooth device, Answer or hang up, This will make your driving more secure, This is a nice car MP3 player; 4 Modes Play Music,Excellent HI-FI Stereo Sound: Play music via USB Flash Drive and TF Card (support MP3/wma/wav/Flv format & support up to 32GB) with MP3 file; Play music with the 3.5MM aux cable; search ''G7'' Bluetooth in your device and connect.built-in microphone with Noise and wind suppressed by (CVC) technology to create full duplex sound quality.anti- statics design, enjoy the lossless music in your car.Micro phone range is 2meters; Broad Compatibility&Mini Design: Lightweight and portable design. A great necessity kit for older car. Universal design for all types of devices(except the truck and bus)! the diameter of product bottom is 20MM. It is Working as Hands-Free Calling and Radio adapter for any devices with USB or Bluetooth including IPhone, iPods, Samsung Galaxy, Google Nexus or other smartphone, GPS and tablets; Hands-free Call,Safe Driving: Search ''G7'' Bluetooth in your device and connect, put your phone near G7 and close your car window,then you can answer/reject/redial call.One Button to Power off,no need to worry about draining battery.Large Screen can show incoming call number, voltage level in car battery, volume, FM frequency and song name.Note: the Bluetooth connect range is 10-15 meters.please kindly delete the other Bluetooth first then it will connect your phone better