approx. 18mm

This is more due to the baby monitor than the charging station. So if the baby monitor supports Charge + Work, then that's fine. BUT: you don't want one of these on the bedside table next to your head. A) the thing has a magnetic coil that always "beeps" slightly. You won't hear it in everyday life, but in the quiet bedroom, you'll go crazy... B) the mass of lithium batteries next to your head is an abnormal risk...if one of them ignites while charging, then you have a high-temperature fire that you can't put out and in your sleep next to your head...well, you can imagine that doesn't end very well. Better use it as a "car park" somewhere far away from you at the entrance or something...

According to the manufacturer's page https://4smarts.com/produkt/ladestation-office-60w-weiss/, the power should be supplied via a Euro cable such as Value power cable Euro flat plug to C7 (3 m).

Here is the answer of our responsible department: It is 60W for the whole product. Each port is 12W and 2.4A max. The width of each compartment is 1.9 cm