Eufy is a sub branch of Anker (very well known for power charging solutions and other things). The thing that sets the Eufy security cameras apart from most everyone else,
is that they pack nearly all their features in without a subscription! They do have 2 subscription options for Basic ($5) or Plus($10) Protection Plans.
The plans get you security monitoring and first responder dispatch. However without a plan, you still get all the bells and whistles that one would expect.
Full featured phone app, smart zones for when to send alerts, night vision, person tracking, quick phone push notifications, fully customizable alerts and settings, and many more!
Except for ones listed as hard wired, they are all USB-C powered (and may contain a battery, mainly only doorbell options that I know of), even technically the solar powered ones can be USB powered!
As a result you are not limited to special charging cable and power bricks! Now to be fair I have not seen all of their cameras, so there might be some that do not fit into this power situation.
Also most all the basic cameras you will need to provide a Micro SD card. A couple have built in storage, but usually only the more specialized cameras. This allows them to store as much
data as the size of card you put in it.
All the ones listed here just need WiFi for internet the connection to interact with. So you do not need any other equipment to make them work! However they do have their Homebase
system. This is a central device that a large number of their units can talk back to. Doing so will allow more features for the cameras, as well as allow for central local
storage. With the local storage, it can store a lot more video with large hard drives, but also if an outside camera was stolen, all the data would be safe inside, and not lost when the camera was taken.
Eufy S330 dual camera doorbell camera. This is a hard wired doorbell that is easy to swap out for your old standard doorbell. They have a battery one also (Battery Powered Dual Camera). This link also includes the Chime that will plug into any normal power outlet. There is no option to add more storage via micro SD card, but does store a lot of footage in it.
Eufy E220 pan and tilt camera. This camera can be manually controlled in the app, but also can lock on to a person and follow them as they move past where it is setup. a micro SD card slot is under the ball fo the camera, you just angle it up to access it.
Eufy E221 floodlight and camera. This floodlight has 2 bright LED "bulbs" and camera. You can adjust the settings in the app, as well as manually trigger the light. It is easy to swap out an old light and put them in its place, as it includes all the needed hardware. Memory is built in, so you can not add a micro SD card to it. However it does store a ton of footage in it.
Eufy C120 camera. This model is the basic model for them. No movement or fancy stuff, just the camera, USB cable, and little stand. They come as a 1 or 2 pack. You plug a microSD card into the side of it for storage. You can get things like a window mount for it also (Window mount). This mount helps cut down on glare from the window to make it clearer.
Eufy S220 solar camera. This model is is a bit newer and shorter than the older one. It can be mounted anywhere that you can still get wifi and at least about 3 hours of sunlight. I have this on the back corner of my house where I had no real way to run a wire, nor want to run a wire. It is tough at times in the winters of Michigan to get enough light. But I offset this by using a 2nd solar panel hooked up with USB. As the other side of the corner of the house might get more sun as the sun sets. (10w solar panel)