Used, in good condition; comes only with the base, exactly as shown in the photo. The Ecobee 4 Smart Thermostat ECB401 is a programmable thermostat designed for home improvement. It features a sleek black design from the ecobee brand, with a model number of ECB401. This smart thermostat is capable of learning your preferences and adjusting the temperature accordingly to help save energy and provide a comfortable living environment. Made in China, this thermostat is a popular choice for those looking to enhance their heating and cooling systems in their homes.