Scare away intruders from anywhere in the world with the Blink Systems Add-On Panic Siren. You can quickly activate the wireless siren via the Blink app, which is available for iOS and Android devices. By simply touching the Panic Siren button in the app, the add-on panic siren produces a loud 105-decibel sound. Likewise, the siren will sound for up to five minutes unless you configure it for shorter periods. Additionally, the 100% wire-free panic siren runs on a single battery and uses a WiFi connection. You can also add multiple sirens to a single system if you need to cover multiple floors or a larger home. Finally the add-on panic siren is only compatible with Blink Systems with a Blink Sync Module.