The alarm panel immediately responds to report the missing point of protection. Many factors affect this choice. The major factor is the construction and decoration of the premises. Plaster walls with metal lathe in them can block the wireless signals. Large mirrors, foil wallpaper, metal lockers and other radio systems nearby might prevent a wireless system from working properly.
Many new systems integrate wired devices with wireless devices.
The main thing to consider is whether the system meets your current needs and whether it can expand to meet your future needs. Typically, alkaline batteries must be changed every year. Newer systems often use lithium batteries that should last 5 years or more. What is the cost to replace the batteries Alkaline batteries can be purchased at any hardware store for a few dollars. Lithium batteries are more expensive and probably must be purchased through the security company, although they are becoming more common.