Check the listing for details. Kidde Smart Smoke Detector WiFi Alexa Compatible Device Hardwired 2 Pack. Condition: Open box. Listed at 80.00 USD. Please note: item is open box but new Voice Alarm announces the hazard type when detected: “Fire!” = smoke or fire or "Replace Alarm" when the unit has come to its end of life span Easy Installation: download the Kidde app & scan the QR code on the back of the smoke alarm Compatible with Amazon Alexa, Google Home, iPhone, & Android smart devices 85-decibel alarm & LED warning indicators alert you to various status: green = normal operation, amber = operating error, and red = smoke, fire or carbon monoxide event WiFi enabled technology allows notifications to be sent to your smartphone (as well as friends & family) in the event of a smoke hazard in your home Photoelectric sensor technology detects visible fire particles associated with smoldering fires Test-Hush Button easily tests the working operation of the smoke alarm & silences false alarms; the Kidde app can also be used to test the smoke alarm