Firmware 4- repeater ready. The Honeywell Resideo SiXCTA Wireless Door Window Alarm Contact is a white window sensor powered by a 3V battery. It is designed for indoor use and offers a 90 dB operating sound rating. The unit features a bracket for easy installation and an adjustable magnet for added flexibility. This 2-way wireless device is compatible with Honeywell and ADT brands, making it a reliable choice for home surveillance. With its Wi-Fi connectivity and sleek design, the Honeywell Resideo SiXCTA is a practical and efficient solution for monitoring your windows and doors.