Justin Carlson is President of Versa Wireless, a US supplier of professional-grade wireless security sensors and Z-Wave 800 Long Range automation devices for alarm dealers, installers, and distributors. With more than two decades in the security-hardware industry, he specializes in multi-frequency sensor compatibility across the major alarm panels — 319.5 MHz (Qolsys IQ Panel 4/5), 345 MHz (Honeywell/Resideo VISTA and Lyric, 2GIG), and 433 MHz (DSC PowerSeries) — and in Z-Wave 800 Long Range for Alarm.com systems. He is a practical source on choosing and installing wireless sensors, panel takeovers and frequency migration (including the Honeywell 5800MINI transition and drop-in replacements), Z-Wave 800 vs. mesh and Long Range range realities, and the installer-experience details — lik...