Help - Aeotec Nano Dimmer Wiring

[TN_Oldman (Don)]

Just found this, did you read this thread?

Aeotec Nano Switch Wiring?

So I installed a couple of these yesterday, I noticed a low, high frequency sound from all of them. My Qubino dimmer is dead silent though. Anybody else noticed this?

Possibly they will have more or better suggestions.