10-Year Battery, Battery Back-Up, Hush Button, Tamper Resistant, Wire-free Interconnect | 10-Year Battery, Battery Back-Up, Hush Button, Tamper Resistant, Wire-free Interconnect | Battery Back-Up, Hush Button, Wire-free Interconnect | 10-Year Battery, Battery Back-Up, Humidity Sensor, Tamper Resistant, VOCs/Airborne Chemicals Sensor |