This Schneider Electric 28307 2214121 Invensys day-night stat kit DA/DA pneumatic is a must-have for any facility that needs to monitor stat readings in both the day and night. This kit includes a stat reader, power supply, and cable. The stat reader can be used to read stat readings from a variety of devices, including HVAC systems, lighting, and security systems. The power supply provides enough power to run the stat reader and keep the device operational during extended periods of use. The cable allows the stat reader to be connected to a computer for data collection and analysis.