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# Contra
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Contra is a low cost 40% keyboard.
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* Keyboard Maintainer: The QMK Community
* Hardware Supported: [Contra ](https://github.com/ai03-2725/Contra )
* Hardware Availability: PCB sold by various vendors
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Make example for this keyboard (after setting up your build environment):
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make contra:default
See the [build environment setup ](https://docs.qmk.fm/#/getting_started_build_tools ) and the [make instructions ](https://docs.qmk.fm/#/getting_started_make_guide ) for more information. Brand new to QMK? Start with our [Complete Newbs Guide ](https://docs.qmk.fm/#/newbs ).
## Bootloader
Enter the bootloader in 3 ways:
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* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is configured.
* **Physical reset button**: Briefly press the reset button soldered on the PCB.
* **Bootmagic reset**: Hold down the top left key and plug in the controller.
