Features:
4 Button Touchpad UI, LCD Display, Provides One Relay Output (SPDT Line Voltage Relay) for SPDT Control
Humidity Sensors and Static Pressure Transducer (0-5 VDC)

Specifications:

Manufacturer: Johnson Controls
Manufacturer Part Number: C450CBN-4
Product Type: Standard Modular Control
External Supply Power: 24VAC
Dimension: 4.35" x 11.2" x 4.3"
Weight: 1.56 lb