The 2GIG-SMKT3-345 is a wireless smoke/heat/freeze alarm intended for use with 2GIG security systems. The SMKT3-345 is powered by 3 x AAA batteries, eliminated the need to run power to the device. The alarm has a built?in wireless transmitter, which communicates with the 2GIG 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 2GIG 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.