1) Easy to install, no wiring or AC power required
2) Powered by 3"5"batteries and 9V - 006P battery
(Not included
3) Use as a door bell, remote pager or S.O.S. alert
for the sick or elderly
4) Pleasant sounding Ding Ding tone
5) Effective distance up to 15m (50ft.)
6) Channel select to avoid interference
7) Plugs into any 220V electrical outlet �V no other installation required
8) 21/14 speaker for realistic sound
9) High/low volume control