AVANTEK DT22 radio Portable doorbell kit, 52 ringtones, 300m range [1 doorbell transmitter 1 Battery Operated Door Chime Receiver & 1 plug-in door chime receiver] (household goods)
Wanted See video on Amazon.com, ordered and delivered was a wireless doorbell with a transmitter and two receivers. A receiver is simply plugged into the outlet, in the other stations 3x 1.5V LR03 batteries are used, which do not belong to the scope