This easy-to-operate Honeywell Home RTH221B 1-Week Programmable Thermostat helps make your home comfortable exactly when you want it. Programmable for one week, it lets you customize your schedule with four options – ‘wake’, ‘leave’, ‘return’, and ‘sleep’ – for precise temperature control and added comfort. Simple step-by-step instructions included with the thermostat make DIY installation easy. Additional features include change reminders for low batteries, permanent and temporary override capability, and soft touch keys for easy operation. Compatible with forced air (gas, oil or electric), hot water and steam, and heat pumps with electric backup.