The wireless interlinked remote controller is a supplementary device that can work with the SAFE TECH SM wireless interlinked smoke alarms, wireless heat alarms, and other SM Interlinked Series. According to the regulation, the detectors should be tested every week to ensure the detectors are working properly. By using the remote controller, you can easily test the Smoke or Heat alarms by simply one pressing the TEST button on the remote controller. The silence function is available only when the detector is triggered. The detectors will be automatically be silenced after 8 to 15 seconds. If one of the detectors is triggered, all the detectors in the group will sound. Pressing the Hush button, all the detectors will be silenced, except the detector that detected the real fire. So you can easily spot which floor or area that was triggered. Feature: * Remote Control ONLY, Alarms sold separately * Test and Silence the detectors * Built-in 10 Year Tamper-Proof 3.0V Lithium Battery * Easy to Pair and Install, Connect up to 20-50 pcs in one group Specification: Battery Life: 2 year Product Life: 10 year Current: 8uA Wireless Signal: 433.92Mhz GFSK RF Distance: