4 wires. piece of cake set. Programming is another matter. if you don't know. You need to learn programming as the instructions that come with it are not very informative. Luckily. Tons of videos on YouTube and websites that are detailed in a more user friendly way. Compatible with Vista 20p and other Honeywell panels. The ability to add wireless sensors and an alpha display are the main advantages of this keyboard. Wireless connectivity makes it easy to expand your alarm system and the 6160RF has a long range. If your system is already programmed or you don't need a wireless connection, you can use cheaper keyboards like the 6150
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