Honeywell CT87K1004 Round Heat Only Thermostat Mercury-free thermostat with simple worry-free operationHoneywell's classic round design, worlds most popular thermostatPrecise temperature control for heat only systemsClassic round stylingDecorative wall cover ring included, hides wall marks from previous thermostatWorld's most popular thermostat. Mercury free with precise temperature control. Decorative cover ring hides wall marks. Wall cover and mounting hardware included. Non-programmable and easy to use. Compatible with heat only systems. Condition: New open box 20% RESTOCKING FEES AND SHIPPING WILL BE CHARGED. IF ITEM IS FUNTIONAL OR INCOMPLETE. Your feedback is extremely important to us!If you are satisfied with our service please take the time to give us positive feedback.We tremendously appreciate it! We strive for your complete satisfaction.Likewise, if you have any issues, please contact us first, and we promise we will do our best to satisfy your needs and solve the problem.If we resolve your problem, we kindly ask you to still leave us positive feedback. Your kindness will be extremely appreciated!