> For the complete documentation index, see [llms.txt](https://brlabelectronics.gitbook.io/hardware-1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brlabelectronics.gitbook.io/hardware-1/functional-description/features.md).

# Features

* 4 Individually Controlled Relays
* Relay Coils Isolated from Development Board 
* Relay LED Indicator 
* Power LED Indicator 
* Screw Terminal Breakouts 
* Pin Header Breakouts 
* Serves 2 Different Development Boards: 
  * Particle Argon Wi-Fi  
  * Particle Boron LTE
* 2.1mm Barrel Jack Power Input 
* Screw Terminal Power Input
* On-board Buck Converter 
* On-board Boost Converter 
* Battery Backup Control Logic 
* 12VDC Main Supply Input 
* 5VDC and 3.3VDC On Board 
* DIN Rail Mountable 
* Small Overall Footprint 
* Lead Free 
* Comes Fully Assembled