> For the complete documentation index, see [llms.txt](https://docs.holybro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.holybro.com/radio/xbp9x-radio/power.md).

# Power

### Supply voltage

* 5V DC from USB or 6-position JST-GH (100mW) 
* 7\~35V DC form 4-position JST-GH (500mW or 1000mW) 

### Transmit current

* 300 mA/5V at 20dBm
* 500mA/7V at 27dBm 800 mA/7V at 30dBm

### Receive current

* 40 mA Serial interface: 3.3 V UART

{% hint style="info" %}
**Please note: when 500MW or 1000MW output is taken, battery must be used for power supply, otherwise the transmission will be unstable.**
{% endhint %}


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