Applicable car models: Mazda 3 2009, 2010, 2011, 2012, 2013 Support wireless/wired Apple Carplay: Wi-Fi/USB connected Support wireless/wired and Android Auto: Wi-Fi/USB connected Reversing Video Input support AHD high-definition 720P camera image input GPS Navigation Support offline, you can download offline maps and with Wifi connected, you can use online navigation, avoid detours. Efficient Allow your vehicle run in a stable manner evein in a long-lasting environment Hi-Fi Music High fidelity, reproduced sound highly similar to your original sound Bluetooth Hands-free call, play music How to connect Bluetooth? Open the phone settings interface, open the Bluetooth in the Bluetooth function, search for Bluetooth devices, find the player's Bluetooth model to be paired; if you need a pairing code, enter 0000; if not, try 1234 or 123456. Steer Wheel Control Make sure whether you car is high-end no not If it is high-end car model, connect canbus and match with your car If it not high-end car model, get key1 and key2 cable of power cable connected to steering wheel controller, and after the model is matched, then get process of learn keys learning of the square control FM/RDS Radio Radio band: FM/RDS Frequency: 87.5HZ -108HZ