Selling because it didn't fit my car. Opened, but practically unused. Please refrain from purchasing if you are sensitive to items stored by individuals. "APP HDMI IN" is an adapter for connecting HDMI output video devices to a CarPlay-compatible display audio system. Specifically, it allows you to enjoy HDMI output from devices like digital terrestrial tuners, Fire TV Stick, DVD players, and game consoles on your display audio via the vehicle's USB port. Even if your car doesn't have an HDMI input, you can enjoy HDMI output from digital terrestrial tuners/TV Sticks/gaming devices with a wired connection to a CarPlay-compatible display audio system. A USB conversion (A ⇒ C) connector is included, supporting USB Type-A/Type-C vehicles. *For car navigation systems and display audio systems that are not touch-panel based, it may not be possible to change the screen size (full-screen display/enlarged display). 【Please confirm before purchasing】① The vehicle must be equipped with wired Apple CarPlay. ② Vehicles equipped with only wireless Apple CarPlay are not compatible. ③ A USB port for communication is required in the car. ④ Car navigation systems and display audio systems that are not genuine products are not compatible. *Do not plug the Fire TV Stick's power into this product's USB port. Please connect the Fire TV Stick's power to a cigarette lighter power source → USB conversion power source, or another USB port. *If symptoms such as sound skipping, intermittent sound, or freezing occur, please try updating to the latest firmware. Please check the instruction manual or our company's Keiyo Engineering HP for the update procedure. *This product cannot be used to watch videos or TV on its own. Please prepare a streaming media player such as a TV stick or a digital terrestrial tuner. *Drivers should not operate the device while driving. This can lead to inattentive driving and traffic accidents. Always stop in a safe place before operating. - Model Name: AN-S134 - Connection Type: HDMI - Function: Apple CarPlay compatible - Application: Streaming media player connection - Application: Terrestrial TV connection Thank you for viewing.