Amazon.com: Mikrotik RouterBoard RB750UPr2 hEX PoE lite is a Small 5 Port Router, 1 USB 2.0 Port and PoE Output. Ports 2-5 can Power Other PoE Capable Devices with The Same Voltage
Mikrotik RouterBOARD 4011iGS+ with Annapurna Alpine AL21400 Cortex A15 CPU (4-cores, 1.4GHz per core), 1GB RA RB4011iGS+RM
LibreNMS – Setting up Alerts to monitor Voltage on Mikrotik Routers | Incredigeek