Honeywell 5808W3 Wireless Photoelectric Smoke/Heat Detector Improved Robust RF Field Strength: The distance between the detector and receiver has been significantly increased without the need for a repeater Smart Check: A signal is sent to the control panel when the detector requires cleaning. This allows a regular nonemergency service call to clean the detector before it goes into alarm. Approved UL Listings for Residential and Commercial Applications: Both residential and commercial installation requirements are met Additional LED Status Indicators: Identifying between alarm or trouble conditions is a snap with green and red LED status indicators. A green LED denotes a normal condition while the red LED indicates abnormal conditions. Easy to install Mounting Base: The sturdy mounting base allows the detector to be more easily installed on uneven surfaces (i.e. stucco). The mounting base has larger mounting ports which accommodate drywall anchors for easy surface mounting.