* volume key is not supported.

(Specification)
It developed for the purpose of something remote control,
You can use media button of bluetooth receiver (such as Sony DRC-BTN40).

Working in the background, you can use it even when the screen is off.

What the app can do is just broadcast the Intent when pressed on the media button.
Since the content of Intent needs to be set by the user self, in order to use
Knowledge of Android application programmer may be necessary.


(Merit)
Using the media button of the Bluetooth receiver as Android remote control,
There are the following big advantages.
- Can be used even when the screen is off
- Can use commercially available Bluetooth receiver


(Demerit)
On the other hand, it has the following disadvantages.
- Because it requires Audio Focus, it can not be used in situations where other applications, such as music or video playback. They keep Audio Focus.
However, this application automatically acquires Audio Focus when no one has Audio Focus.

- Quality problem of Bluetooth device, compatibility problem with Android rarely occurs.

Therefore, it can not be guaranteed that it can always be used stably, troubleshooting can be very difficult.


(important)
- Please use at your own risk.
- It is prohibited to use it as an official submodule of other applications.


(Purpose)
- It can be used as Zello's PTT. It supports "talk while pushing" using long press of fast forward or rewind. Please set the PTT button on the application side of Zello. This Intent data is preset.
- When the device is in a box or case, for example AR, VR, exhibition etc. It can be used as a little remote control.