Hassle-Free: Effortlessly mount Wireless Doorbell Pro for front porch protection in under 30 seconds. Screws and hardwiring equipment, though optional, are included, for even more ways to install. See the whole story – clearly: A 1440×1440 fuller than HD sensor means you’ll see it all with 33% more clarity than traditional HD cameras. Chime Included: Hear your doorbell ring, chirp, or bark. Choose between 20 unique tunes and 8 sound levels to find the perfect chime for you, even scare off potential intruders with a dog bark. Optional upgrade available: upgrade to Cam Plus to receive real-time alerts when people are detected and store full-length videos in the cloud for 14-days.