For events that repeat:
The hallmark of the Model 2159t is its vibrant color screen. To optimize visibility and power consumption:
A. DC Adapter (Recommended for Daily Use): Plug the included DC adapter into the jack located on the rear of the unit and connect to a standard wall outlet. The screen will light up instantly.
B. Battery Backup (For Memory Retention Only): Open the battery cover on the rear and insert 3x "AAA" batteries (not included).