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2. The 5 best battery-operated video doorbells that don't need ...

   www.aol.com/lifestyle/5-best-battery-operated...

   Video doorbells add an extra layer of security to your home. These battery-operated video doorbells don't need any wiring to work. The 5 best battery-operated video doorbells that don't need wiring

3. Best video doorbell of 2023 - AOL

   www.aol.com/lifestyle/ding-dong-best-video...

   That means you'll need a battery-powered option, so I recommend the wildly popular Ring Video Doorbell, which offers night vision and pretty much every other desirable feature. Reasonably priced ...

4. The 7 best battery-operated wireless video doorbells for ...

   www.aol.com/best-battery-operated-wireless-video...

   Wireless video doorbells are the new must-have products for apartments! Stay safe and secure with these seven battery-operated options.

5. Doorbell - Wikipedia

   en.wikipedia.org/wiki/Doorbell

   Doorbell mechanism from 1884 in Andrássy Avenue, Budapest Antique mechanically operated shop doorbell on a torsion spring. William Murdoch, a Scottish inventor, installed a number of his own innovations in his house, built in Birmingham in 1817; one of these was a loud doorbell, that worked using a piped system of compressed air. [1]

6. Electronic lock - Wikipedia

   en.wikipedia.org/wiki/Electronic_lock

   The key contains a power supply device, usually a rechargeable battery or a replaceable battery in the key, used to drive the system to work; it also includes an electronic storage and control device for storing the identification code of the lock. The software is used to set and modify the data of each key and lock. [2]

7. Master Lock - Wikipedia

   en.wikipedia.org/wiki/Master_Lock

   In 2012, Master Lock introduced a line of combination padlocks called the dialSpeed. [17] The dialSpeed lock is battery-operated, has a lit face, and features multiple user-programmable combinations. It has a master unlocking code that can be accessed through the company web site. [17] In 2014, Master Lock acquired SentrySafe for $117.5 million ...