Product information:

The BetterBox PDU-POWMON-x Inline Energy Meters allow the user to quickly and efficiently upgrade any Power Distribution Unit (PDU) or any existing stand-alone equipment with the capability to display and monitor, in real-time, watts per hour, power consumption, current and energy used in addition to the in-built overload power alarms.
Simple to install, just by plugging the inline meter between the mains power connection and the PDU or stand-alone legacy equipment you obtain a visual indication of your equipment's power health.
Alarms are fully programmable by the user for power and energy levels.

Functions
Measure Voltage, Current, Active Power and Energy.
Overload alarm function. If over alarm threshold back light and power flashing to alarm.
Power alarm threshold can be pre-set.
Back light.

Specifications and Display Format

Power test range 0 ~ 22kW
Below 1kW the display format is 0.0 ~ 999.9W
Between 1kW and 10kW the display format is 1000 ~ 9999W
For 10kW and above the display format is 0.1 ~ 22.0kW

Energy test range 0 ~ 9999kWh
Below 10kWh the display format is 0 ~ 9999Wh
For 10kWh and above the display format is 10 ~ 9999kWh

Voltage test range 80 ~ 260V
Display format is 80 ~ 260V

Current test range 0 ~ 100A
Display format is 0.00 ~ 99.99A