Providing CD quality sound, Evo wire free door chimes from Friedland can either be plugged into existing indoor 13A sockets, or battery operated, making them completely portable. The portable chimes offer transmission ranges of 50m, 100m or 200m with a choice of four tunes, though metal structures and thick walls may reduce transmission distances. For households and gardens where the occupants may be hard of hearing the wire free chime kits are available with strobe lighting.