Mains Smoke Alarm (rechargeable battery)

Mains Powered Smoke Alarm is specifically designed to continuously
monitor smoke concentration. Adopting advanced split-spectrum
photoelectric chamber and a built-in high-volume buzzer, it responds
quickly and becomes highly sensitive with stable performance and
low false alarm. Once the surrounding smoke concentration reaches
the alarm value, it will promptly send out visual and audible alarm
signal to remind the user to take immediate measures. Smoke alarm
can be interconnected via a hardwired or wireless system (using
optional WisuLink wireless interconnected module). Once one device
triggers an alarm, the alarm signal will be pushed to every alarm in the
interconnected network and they will raise the alarm in unison.