Qolsys QS5110-840 IQ Wireless Smoke and Heat Detector

The IQ Smoke is connected to your IQ Panel and monitored 24-7 whether your system is armed or not. The IQ Smoke detects the presence of smoke using photoelectric smoke-sensing technology and conforms to UL 217. The IQ Smoke detects the presence of smoke particles as well as the rapid rise in heat that can come from a fire even if there is no smoke. Because your system is always connected you can receive a text or email alert if there are any problems wherever you are."Always on" technology ensures that the sensor is monitored 24 hours a day whether your system is armed or not. Ultra-sensitive smoke sensor prevents false alarms while constantly monitoring. Heat sensor detects rapidly rising heat from a fire - even when there is no smoke such as an electrical fire. Wall or ceiling mounted. Battery life of 3 to 5 years.