NO BASE STATION REQUIRED: Can be set up within minutes & can pair with other Swann sensors, sirens, cameras & more. Once the items are connected to Wi-Fi you can get push notifications from the sensors & CUSTOMISE the siren DETER INTRUDERS: Once paired together, Swann's Wi-Fi Alert Sensors trigger the Siren with audible options for a voice to say "Sensor triggered", sound a 'ding dong' or 'beep beep', or a traditional siren PERFECT FOR RENTERS AND OWNERS: 2 sided tape for sensors allows for non-permanent & permanent installation & the siren mounts easily on walls or place it on a flat surface, making this an ideal security kit whether you're an owner or renter RELIABLE WEATHERPROOF DESIGN FOR EASY INSTALLATION: Each Motion sensor is tested to withstand any weather CUSTOMER SUPPORT: Swann provides protection against factory defects; If you experience any challenges with our products, simply contact customer service via email or Amazon Message & we will assist in the setup, operation & any warranty enquiries, Manufacturer: Swann