With a siren you can build your own alarm system or use it to get extra notification if something happens in your home/businessYou can supplement with other products from Alpina to expand into your own smart alarm system. If you have a motion sensor, you can make sure that this siren sounds at the slightest movement. The sound will scare off any intruders and alert you that something is happening. Combine with other Alpina smart productsYou can of course use this smart siren together with other Alpina products. Connect smart motion sensor and surveillance camera to the siren so it sounds when something sounds or moves in the room. With its noisy 90 decibels, you won't miss out if something unforeseen happens in your home. So connect your own alarm system, only your imagination sets the limits Everything is easily connected with your WiFi and Alpina Smart Home app. Alpina Smart Home app Just like with other Alpina smart products, you connect the siren with Alpina's app. Available for download to Android or iOS in the Apple Store. In the app, you can set 8 different sounds for smartphone when notified. The app also shows exactly which siren sounds if you have more people connected. Of course, you get a notification when the siren sounds and if you have an Alpina surveillance camera, for example, you can see in real time what is happening at your place, even if you are not at home. Package Included:- Smart Siren- Quick GuideSpecifications:OS System App: Android/iOSSamplification: Micro USB / 2 x CR123AMax. Antenna Gain: 0 dBiSiren Strength: 90 dB within 3mVisual Warning Signal: Flashing LEDIn Voltage: 5V DCMax Transmitting Power: 14.26 dBmFrequency Range: 2412 – 2472 MHzWireless Technology: WiFiSize (LxWxH): 68 x 68 x 30 mmWeight: 0.06 kg