# Green LED

There is a green LED on top of every S2 radio node. 

The LED shows the power is present and also gives additional information about the sensor status as described in [status-led](https://help.boomerang3.com/s2-radio-system-manual/s2-system-description/s2-node/status-led "mention").

The interfaces like S2IOG2 or PT100 converter are not equipped with LEDs.