Self-powered outdoor siren with piezoelectric speaker, managed by micro controller , with flashing LED lamp. Two additional LEDs (one red, one green) to signal system status, power supply failure, deterrent function and installation mode. Integrated tamper contact balancing resistor (by-passable, 1.8Kohm, suitable for use with Comelit Vedo control panels). Polarity of the inputs can be configured separately for flashing light and speaker. Jumpers for programming: input polarity and logic, maximum alarm time, siren type, tamper balancing, deterrent function.