The Invincibell range of external sounders give a perfect visual deterrent, with its 104db(A) loudness and strobe effect which activates on alarm the Invincibell E will alert people in the vicinity if anyone tries to enter a property.
With front, rear and power cut-off tamper protection, if anyone does try to disable the sounder you will be alerted. The engineer hold off mode, activated when the panel is in engineer mode, will ensure that there are no unwanted alarms while the system is being installed or serviced.
3 Way tamper action
Activation from front, back, and power supply cut off ensures protection from sabotage attempts. In this situation, the siren will activate independently of the control panel.
Sound Pressure Level 104dBA
Siren cut-off timer
The cut off timer is defaulted to 15 minutes to meet industry regulations.
Revolving guide holes
Unique levelling mechanism including in-built spirit level and revolving guide holes.
Supplied with battery
Complete with a backup battery so that even in the event of an intruder sabotage, the bell box will still operate and protect the property.
Universal triggering inputs
Can be connected to any output on a manufacturers control panel, positive applied, negative applied, positive removed, negative removed.
Remote engineer hold off
Possible to disable the bell box tamper when a control panel is in engineer mode.