Bluetooth Car Kits, Souldio&trade; Bluetooth 3.0 Audio Receiver for Home/Car Audio Music Steaming Sound System, Handsfree Speakerphones with Dual SI Port USB Car Charger and Stick Base (Black) Complete car kit - Bluetooth music receiver with built in microphone for calls and USB car charging kit. Steam stereo music from smartphones, tablets, or Bluetooth-enabled audio devices and play them through your car's audio system With dual usb car charger, SI port, it will automate identify your device input, provide suitable current to product your devices. SI port car charger is removable and can be used alone. Package included: Bluetooth audio reciever*1, car charger*1, 2 in 1 charging and audio cable*1, user manual*1