Built-in CarPlay & Android Auto system: Connect with mobile phone to access mobile phone contacts, email, notification, map navigation, music, video and other information. Built-in Bluetooth function, can connect to phone, and handsfree calling, more when driving car,bluetooth music play FM radio: You can listen to real-time traffic, news boradcasts, weather forecasts, etc. FM/MPX receiver 18 preset Store Function Support Steering wheel control function : Quickly switch functions which you want with your car's steering wheel,more convenient Support reverse rear view system: If connect to a car backup camera, the car stereo monitor turn to rear view reversing details automatically and help driver a safe parking AUX audio input interface supports external MP3, mobile phones, music players, etc. Frequency:Default transmission frequency 88.60/89.50/91.50/93.00/93.90/95.10 MHz(optionalfrequency range 87.50-108.00MHz) Power:Built-in 1W speaker Voltage:12~30V Temperature:-10~60°C BT