Peplink EssentialCare Extended Warranty for Balance 580X - 1 Year [SVL-BPL-580X-1Y] RB5009 and the EdgePower 54V offers

and the EdgePower 54V offers a 12V lead acid battery input for redundancy if the AC input fails over (battery not included)

full HD audio

Maximum Number of AP Support: 50

dirt and sand

The HT813 is an analog telephone adapter that features 1 analog telephone FXS port and 1 PSTN line FXO port in order to offer backup lifeline support using a PSTN line

Peplink EssentialCare Extended Warranty for Balance 580X - 1 Year [SVL-BPL-580X-1Y] RB5009 and the EdgePower 54V offersPeplink EssentialCare (1 Year) for Balance 580X Simplified network maintenance. Includes InControl cloud management, firmware updates, product warranty, and technical support. Effective for 1 year, non refundable.