Byron - BY202F Wirefree Plug In Chime Kit + Light 100m - BYRBY202F
The BYRBY202F Version also has a flashing light alert for the hard of hearing.
Byron BY202 Wirefree Plug-In Door Chime Kit has a 100m range, and chime with 6 sounds. Over a million self-learning codes. Will keep the code even when the chime unit is unplugged and then replugged in. Can have upto 6 bell pushes controlling the chime. 80-85dB rating depending on the sound.
F version also has a flashing light alert for the hard of hearing.
Push requires 1 x CR2032 battery (included).