Generally, there are three types of security surveillance cameras in the market. Depending on what you're looking for, wired, wireless or wire-free camera, either can be a good choice .
Wired Camera: Wired security cameras can be a little hard to install. Most time you will need to hire a professional installer to do the job. But you get what you paid for - they're ultra reliable for long term use. Wired cameras have to wire into a recorder box (or a PoE switch/injector), internet network and sometimes a power source (If they are not IP cameras). They’re perfect for homeowners who want 24/7 constant security video surveillance on their outer boundary of a premises and who won’t need to move the cameras around.
Wireless Camera: Wireless cameras is not really "wireless" that can be put anywhere you want. They are a bit easier to install than wired cameras, but they still need to wire into a power connection and connect wirelessly to your internet network (if there is a good signal coverage). These cameras can upload video to the cloud or a local storage drive (e.g. a SD card), but just like your home wireless network, the wireless signals interference is guaranteed.
Wire-free: Wire-free cameras are the easiest wireless option for the lightest use. They don't provide constant 24/7 video recording like wired cameras. They still require wireless network connection (if there is a signal coverage). They only start working on demand or by motion-triggered events. But good thing is they don't use any wires at all. They run off of removable or rechargeable batteries and upload video to the cloud or a local storage drive (e.g. a SD card). That's why these kind of cameras are perfect for camping, wildlife observation or off-grid remote site surveillance.