Wireless outdoor siren with solar panels for 230 V or 5-28 V It is easy to spot on your exterior walls, which deters potential burglars Visual alarm with flashing red LEDs, strobe light visible at an angle of up to 180 degrees Acoustic alarm available with sirens including 3 individually adjustable volume levels (max. 100 dB) In case of a break-in, the outdoor siren triggers an acoustic alarm via the sirens, flashing red LEDs, and push notification Maximum added value in the system: you need a Bosch Smart Home controller or Bosch Smart Home controller II to integrate the device into your Bosch Smart Home system, Weight: 2.866009406 pounds, Manufacturer: Bosch