• How to install the unit refer to: https://youtu.be/grtCAnA0YEM
• You may need  to use the OBD adapter harness we provide to get RPM, door status and AC control working. Connect one side to OEM OBD port, and the other end with 2 pin connector to main harness 2 pin connector.
• To make connections to the head unit, just match connectors and/or labels. If on-screen AC control is not working, check if 8 pin connector with green and green/black or white and white/black wires is connected to the back of the unit.
• The two small knobs and press-and-hold function of physical buttons on both sides can be programmed to certain functions that you like. Please refer to: https://youtu.be/OZhknvTLQeQ
• There are two different brackets, install one of them according to if your car has heated and cool seats or not.
• If your vehicle has bench seat for first row, you will need below piece to cover the Gap space below the panel. if your vehicle has floor console, then it is not needed.
• DO NOT use external MIC unless the built-in and OEM one is not working
• Not all the connectors need to be plugged in, just connecting the matching connectors to the vehicle.
• The rear ceiling connector is similar with the factory microphone connector, PLEASE do not mix them up.
• The antenna adaptor may not be used if OEM radio antenna fits already.
• For 2014-2019 Toyota Tundra, you can use factory GPS adaptor we provide.
• The SIM card can be put into the back of the unit and also the SIM card reader cable we provide. T-mobile would be better to work in our unit for now.