Regarding how to reset a PowerConf speakerphone, please see the chart below:

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<table style="border: none;border-collapse: collapse;" width="624"><colgroup><col width="124"></col><col width="500"></col></colgroup><tbody><tr><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 124px;">
			Product Name
			</td><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 500px;">
			Reset
			</td></tr><tr><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 124px;">
			PowerConf

			PowerConf+

			PowerConf S3
			</td><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 500px;">
			1. press and hold down the Bluetooth button 

			2. press the Volume &quot;-&quot; button until the square indicator flashes four times
			</td></tr><tr><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 124px;">
			PowerConf S500
			</td><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 500px;">
			1. press and hold down the Bluetooth button 

			2. press volume &quot;-&quot; button until the light bar turns red, after that, the speakerphone will restart
			</td></tr><tr><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 124px;">
			PowerConf S330
			</td><td colspan="1" rowspan="1" style="border-bottom: 1px solid #000000;vertical-align: top;padding: 7px 7px 7px 7px;border-top: 1px solid #000000;border-right: 1px solid #000000;border-left: 1px solid #000000;width: 500px;">
			N/A
			</td></tr></tbody></table>
 If you have additional questions, please contact <a href="https://support.ankerwork.com/s/contact-us" target="_blank">us</a> for further assistance.</div>
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Product Name	Reset
PowerConf PowerConf+ PowerConf S3	1. press and hold down the Bluetooth button 2. press the Volume "-" button until the square indicator flashes four times
PowerConf S500	1. press and hold down the Bluetooth button 2. press volume "-" button until the light bar turns red, after that, the speakerphone will restart
PowerConf S330	N/A