Customize your motion zone settings to focus on areas you need to protect. Get a more reliable connection with dual-band (2.4 or 5.0 GHz) wifi connectivity. Quick Replies let you answer the door with preset responses, or save time and ask visitors to leave a message with just a few taps. Powered by a removable, rechargeable battery pack or connects to doorbell wires for constant power. Monitor what matters most with infrared technology-even when it's dark.Works With Alexa so you can hear audio announcements when anyone presses the doorbell or triggers the motion sensors. Ring Alarm and all Ring Alarm accessories require a subscription for digital notifications, in-app features, digital arming/disarming, and integration with other Ring, Echo, and third party products.