Since it’s wire-free, it’s battery powered, and batteries will need replaced periodically.
Wireless systems, that aren’t encrypted, can have their signal jammed, disabling the alarm.
The distance a wireless signal can travel will be less than that of a hardwired device. Wireless signal can also get interference from other devices such as baby monitors, and remote controls.
Wireless equipment is more bulky than hardwired equipment and will be more noticeable on your doors and windows.
Wifi camera’s will only work where you have wifi signal. Moving an IP camera further away from your router will make it more likely to drop connection.
Wireless signal can be purposely jammed by a jamming device or accidentally jammed by overlapping signals.
Wireless makes hacking very easy to execute, since all you have to do is spoof the end device’s address and send the data in the same format.
The quality of your video depends on the signal your camera is getting. If you have a poor connection, you will likely be missing sections of video, or the camera may be unable to transmit video in realtime.