It has a Greek menu.
It takes a sim card. It has a management app that the parent downloads from the Play Store on their phone.
The watch does NOT accept and does NOT make calls except to the one who has the watch's management app installed on their smartphone and indeed with a QR code.
Beyond traditional phone calls, from the app on the phone, the parent can see the exact location of the child, how many steps they have taken, and can send them a text or voice message, and the child can respond in the same way. This method of communication requires the activation of a data package on the sim card that is in the watch. There is an option for the child to make a quick call by holding down the side button.
Battery. It is reasonable to need charging every other day because essentially you have a phone with GPS and internet connection with a tiny battery.
I highly recommend it.