Alween Car Wireless Bluetooth FM Transmitter Kit with Hands-free Calling, USB Charging and Music Controls (All Bluetooth Devices) SAFETY-FIRST: Hands-Free calling makes you no warry about any call during your drive. Switch effortlessly with the Adjustment Button with comfortable tactile. SIMPLY SMART: Memorizes each devices settings after first connection. Automatic Bluetooth pairing for connected devices. QUICK CHARGE: Charges your smart devices in an instant with 5V/2.1 output. Identifies the current of connected electronic devices and charges them instantly. MUSIC PLAYING: High quality AUX Audio cable with smart phone input and car audio system output. Carry your music library in a TF card and play it on the move. Supports All Major Brand smart phones and iPad using Bluetooth. Come with One-Year Warranty.