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X306
,The V1.3 & V1.5 version has a 4-pin reserved interface (AL, ON, GND, PSW) that can be used for the following functions:
* <span style="color: #c0392b; font-weight: bold;">⚠️ '''Note:''' To use these expansion functions, you will need to prepare your own soldering tools, 4-pin header, jumper cap, and 2-pin momentary switch. These items are '''not included''' in the X306 package.</span>
'''🔧 Preparation'''