IDEAL 61-797 Manuel D'instructions page 13

Read the stored value of PI test under RECALL mode
Auto Power Off (Battery Saver)
Restore power by switching the Function Selector or by pressing
any button.
Auto Backlight
The backlight is automatically turned on in a dark environment.
Buzzer
The Meter beeps once for every valid key-press, and beeps twice for
every invalid key-press.
13