Installing a video doorbell means you can see who is at your door from your phone, whether you are on the couch or across the country. The setup usually takes under an hour, turning a standard entry into a connected security hub.
Prime Day is your best bet to grab these systems at a discount. Watch for bundles that include the chime, and always check at least two different retailers to make sure you are getting the true sale price.
Remember that the 18-month window is a deadline, not free money. If you have a balance left when that time is up, the bank will start charging interest on whatever remains.