The Honeywell Ademco 5820L Slim Line Wireless Transmitters are designed for use with the Vista 2GIG system. These units are white in color, with a sleek and slim design, making them unobtrusive in any home environment. Compatible with other Honeywell devices, these transmitters offer a reliable and secure way to enhance your home security system. Each unit stands at 4 inches tall and is part of the 5800 Series Wireless Devices, ensuring seamless integration into your smart home setup.