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Ring LLC is a manufacturer of home security and smart home devices owned by Amazon. It manufactures a titular line of smart doorbells, home security cameras, and alarm systems. It also operates Neighbors, a social network that allows users to discuss local safety and security issues, and share footage captured with Ring products.
The smart doorbell lets the home owner use a smartphone app to watch and talk with the visitor by using the doorbell's built-in high-definition infrared camera and microphone. They can be either battery operated or wired. [1] Some smart doorbells also allow the user to open the door remotely using a smart lock. [2]
A battery charger, recharger, or simply charger, [1] [2] is a device that stores energy in an electric battery by running current through it. The charging protocol—how much voltage, current, for how long and what to do when charging is complete—depends on the size and type of the battery being charged. Some battery types have high tolerance ...
A doorbell is a signaling device typically placed near a door to a building's entrance. When a visitor presses a button, the bell rings inside the building, alerting the occupant to the presence of the visitor. Although the first doorbells were mechanical, activated by pulling a cord connected to a bell, modern doorbells are electric, operated ...
Car dealerships across North America have faced major disruptions this week. CDK Global, a company that provides software for thousands of auto dealers in the U.S. and Canada, was hit by back-to ...
IUoU is a DIN -designation [1] (DIN 41773) for a lead-acid battery charging procedure that is also known as 3-stage charging, 3-phase charging, or 3-step charging. It consists of three phases (or stages), to be executed by a battery charger. The three phases are: I-phase (constant electric current ), Uo-phase (constant over- voltage ), and U-phase (constant voltage). The purpose is to fully ...
Solar cell phone chargers use solar panels to charge cell phone batteries. They can be used when no electricity supply is available—either mains or, for example, a vehicle battery—and are sometimes suggested as a way to charge phones without consuming mains electricity, unlike electrical cell phone chargers. Some can also be used as a conventional charger by plugging into an electrical ...
An AC adapter or AC/DC adapter (also called a wall charger, power adapter, power brick, or wall wart) [1] is a type of external power supply, often enclosed in a case similar to an AC plug. [2] AC adapters deliver electric power to devices that lack internal components to draw voltage and power from mains power themselves.