This keypad is an essential tool for HVAC service technicians who need to control the Hand/Off/Auto functions of their VSD Drive. It allows for easy and precise adjustments to be made, ensuring optimal performance of the drive. The keypad is designed with durability in mind, making it suitable for use in a variety of environments. With its user-friendly interface and intuitive design, this keypad is an excellent addition to any HVAC technician's toolkit.