The Skybell HD has a small backup battery but relies most heavily on being hardwired into your existing doorbell’s electrical. This wireless video doorbell is motion activated, which means that you will receive alerts to your smart phone when anything is close enough to the doorbell even if it doesn’t actually ring the doorbell, which is a nice security addition. Its weatherproof design is particularly thoughtful, with operating capacity in extreme temperatures 40F to 149F, a specialized rust prevention coating on the camera, and a plastic exterior to resist water and help with the connection to wi fi. With a choice of bronze or silver finishes, you can coordinate the Skybell HD with your existing home hardware. Skybell HD connects with several smart home devices such as Alexa, Nest, Honeywell, and others. Get it from Amazon: Skybell HD Video Doorbell. 5. Zmodo Greet Smart Wi Fi Video Doorbell with BeamView in galleryThe round, stylishly modern, and easy to install Skybell HD Video Doorbell provides high resolution 1080p video with up to 5x zoom in and an extra wide angle lens 180 degree field of view to really give you a bang for your video feed buck. Night vision is another feature that improves the visual connection you will have with whomever is at your door, as you can see them in full color HD video. One of the benefits of the Skybell HD Video Doorbell, in comparison to other video doorbells on the market today, is that it doesn’t require a paid monthly or annual video storage subscription, which means that your cost is your final cost. Your video footage is stored for free in the cloud for seven days, with the option for you to save footage to your phone if you want or need.