Honeywell Home 5820L Wireless Slim Door/Window Transmitter

Compact wireless door and window transmitter designed for seamless integration with security systems. Nearly one-third smaller than standard models, making it ideal for casement and double-hung windows where space is limited. Features surface-mount installation for flexible placement and includes a lithium battery for reliable, long-lasting operation. Delivers powerful, versatile performance for even the most challenging installation scenarios. What's Included: Wireless transmitter AAA lithium battery