BULK OF 50 sensors (lot of 50). Honeywell Resideo 5816 5800 series WMWH Door / Window Transmitters with magnet. Brand new in box. ColorWhiteDepth1.2″Height3.1″Width1.6The 5800 Series of door and window transmitters provide the most reliable, convenient and cost effective solutions for security protection. These devices are powerful and versatile enough to help solve even the toughest, most labor intensive installations. With a demonstrated outdoor range of over a mile, the 5800 Series has the best performance of any transmitters available today.