Buy now. Powered by 4 AA batteries, the Vodool Smart Wireless Doorbell with Night Vision stands out for many reasons, including its motion detection capabilities, 166 degree range of view, and easy installation. When the Vodool senses motion, it starts recording video in 720p resolution to a micro SD card sold separately, and it can also be configured to send an alert to your smartphone, smart home device, or PC. The Vodool is compatible with Amazon’s Echo devices, allowing you to talk to the person at the door through an Echo Dot as well as through your smartphone. In addition to the micro SD card, buyers can subscribe to optional cloud video storage, which is free for three months and costs $2. 95 per month for continued service. The Vodool comes with a limited one year warranty. Buy now. With 1080p resolution, the Ring Video Doorbell 2 offers excellent video quality, both during the day and at night. Homeowners love its quick motion detection and 160 degree range of view, as well as its audio clarity and ability to pair with Amazon Echo devices. Motion triggered video records directly to the cloud, which requires a $30 annual subscription fee after one month of free service no other video storage option is available.