2GIG’s Wireless Smoke/Heat/Freeze Alarm is a 3xAAA battery‐powered wireless alarm. The alarm has a built‐in wireless transmitter, which communicates with the Control Panel. When smoke, excessive heat or cold is detected, the alarm sounds a loud local alarm and the built‐in transmitter sends a signal to the Control Panel. This alarm is designed to provide protection within a 35‐foot radius of the unit. The 2GIG‐SMTK3‐345 can send alarm, tamper and battery condition messages to the Control Panel.