ProSeries Wireless Combination Smoke/Heat/Carbon Monoxide Detector. The PROSiXCOMBO is a two-way, professionally monitored, wireless, combination smoke/heat and carbon monoxide (CO) detector. Multi-Threat Detection The Honeywell Home SIXCOMBO from Resideo is a two-way wireless smoke and carbon monoxide detector with four sensing elements that improve detection while reducing false alarms. This smart home security system device is equipped with a battery pull-tab and auto-enrollment for easy installation.
