The unit is operated by children mains plug and provides a soft nightlight that can be switched on when required.
The parent unit can be operated via the mains or with batteries (not included). Practically, if you have no outlet available on holiday on the terrace or the balcony, I could have done better find a rechargeable battery. With us the baby monitor has at all tested sites to work properly, even through several locked doors / walls. However, we have not yet exhausted the 50 meters indoors or 300 meters range outdoors. If the connection is lost, a red light on the parent unit lights up. The sound is fine, but tends to oversteer.
Both devices are relatively small and very light and can be take in the holiday good with. The price is relatively high for a basic baby monitor, on the other hand we can not yet complain about failures, what can not be said of our previously used Hartig + Helling Baby Call. Who can do without 2-way communications, video surveillance and other additional functions or a small, lightweight device for the holidays looking mainly, does nothing with the AVENT SCD501 / 00 wrong.