Built-in CarPlay and Android Auto system: Connect with mobile phone to access contacts, emails, notifications, map navigation, music, video and other information. Built-in Bluetooth function, can connect to phone and hands-free calling, safer when driving a car, Bluetooth music playback FM Radio: You can listen to real-time traffic, news, weather forecast, etc. FM/MPX Receiver 18 Presets Storage Function Support Steering Wheel Control Function: Quickly switch the functions you want with your car's steering wheel, more convenient Support Reversing Rear View System: If you connect to a car rearview camera, the car stereo monitor will automatically turn to the reversing details of the rear view and help the driver park safely AUX audio input interface supports external MP3, mobile phones, music players, etc. Frequency: Default transmitting frequency 88.60/89.50/91.50/93.00/93.90/95.10 MHz (Optional frequency range 87.50-108.00 MHz) Power: Built-in 1W speaker Voltage: 12 ~ 30V