The Honeywell YTH5320R1000 RedLINK Wireless Thermostat Kit is a wall-mounted programmable thermostat that operates on battery power. It features a digital control style and a 2.5-inch display, making it easy to use and monitor. This thermostat is compatible with Honeywell systems and can be controlled remotely through Wi-Fi connectivity. With its wireless design and auto system switching feature, the Honeywell YTH5320R1000 offers convenient and efficient control over your heating, cooling, and air systems.