Are those WiFi phones plugged into the wall or are they cordless? I believe the advantage of DECT is that the phones consume much less power compared to WiFi wh

Are those WiFi phones plugged into the wall or are they cordless? I believe the advantage of DECT is that the phones consume much less power compared to WiFi which makes sense if they're on battery. Many of the IP phone vendors use DECT instead of WiFi for this reason and they sell POE DECT transcievers.