🔧 Simplify Your Comfort Control! Easily read in low lighting for ultimate convenience. Keypad lock and temperature limits for peace of mind. No sensors needed, just plug and play. Streamlined installation with built-in level indicator and pluggable terminals. Includes user manual and 2 AA batteries for immediate use. 4.5" LCD Display Battery Powered Keypad Lock The Emerson1F83H-21NP Heat Pump Thermostat is a non-programmable, user-friendly device designed for easy installation and operation. Featuring a large 4.5-inch LCD display, keypad lock, and dual fuel compatibility, it ensures efficient temperature management without the need for complex sensors. Ideal for modern homes, it comes with essential components including batteries and a user manual.