Compatibility - works with Echo Show/Echo Spot/Fire TV and Google Home Hub/Chromecast so you can watch or stop live video streams with a simple voice command 3MP High Definition with Weatherproof - ultra high 3MP(2304 × 1296) definition with enhanced night vision up to 98 ft.; weatherproof ensures your device will be protected against rain and dust Two-way Audio with Built-in Siren - use crisp 2-way audio to communicate with the delivery person at your front door or use the siren to scare away intruders Motion Detection and Activity Zones - custom activity zones and notification will sent to your phone once motion is detected SD Storage - local storage supports up to 128GB Micro SD card (SD card is not provided)