Alps F9211b

If the factory amplifier (AMP) does not turn on, the F9211B’s "AMP CON" (blue wire) needs to connect to the car’s remote turn-on wire. Do not skip this; otherwise, you will have silent speakers.

The integrated ISP (Image Signal Processor) in the F9211B supports 4-channel AHD (Analog High Definition) camera input. You can stitch together a 360-degree bird's-eye view with zero lag—essential for large SUVs and trucks. alps f9211b

Warning: Do not mix firmware for the "F9211B" with the "F9212A." They use different touchscreen drivers, and mixing them will invert your touch axis. If the factory amplifier (AMP) does not turn