Deltabell Plus Backlight and External Sounder Module The Deltabell PLUS provides light to cover to provide around the clock visual deterrent A number of engineer friendly features; the unique levelling mechanism and modular components now make simple sounder installation a reality for you. Piezo sounder technology 3 Way tamper action Universal triggering inputs Supplied with rechargeable battery Engineer hold off Remote engineer hold off input Backlight Fully backlit - When used with backplate base of the Deltabell Plus is backlit constantly, providing free advertising for your company Piezo sounders with high decibel output - Belle: 118dBa. Decibell E/ Deltabell E / Deltabell Plus: 104dBA. 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. Positive/Negative trigger inputs - Can be connected to any output t