The "Auto Power Off" feature in the DB-90 helps to prevent unnecessary battery drain. The DB-90's power will shut off automatically if no operation or adjustment is made within 60 minutes after any button is pressed. Use the following steps to disable the Auto Power Off function:

1. While holding the TAP button, switch on the power of the DB-90. "OFF" will show in the display, indicating that the Auto Power Off feature is disabled.

2. Release the TAP button.

Note:The Auto Power Off function will be enabled the next time the DB-90 is turned on again.