There are many power meters that can interface to Mango. There are many RTU's and loggers as well. However this is something quite unique I believe. It is a 1U rack mount device that does dual 3 phase (400VAC) monitoring. So a total of 6 phase voltages and up to 8 current transformers. Apart from being an IEC compliant dual power meter, it also supports a sensorbus that can daisy chain up to 127 sensors. Each sensor has 5 analog/digital inputs/output, temperature, humidity and ambient light.
We have a couple of these doing power monitoring, temperature, humidity, motion, cabinet door, server room door, etc via Mango. Mango interface is primarily SNMP over Ethernet.