Sorry~~I have a more question
My countdown clock is not working. It only show as the attached file. What problem with it. Thanks you for your help

P1030565.JPG (38 Kb, 26 downloads)

Disassemble the display and check to make sure that the battery has 12VDC or greater. The battery is located inside under the horn. Replace the battery if it is less than 12V.

You have to remove screw that holds the horn to case along with the face plate screws.

Displays not in use should always be left off and on the charger.

quote:

Disassemble

Thansk you for your help.
I have already disassemble the dispaly and checked that the battery is OK, I test it with timy, the clock the running by battery, and horn is working. It only can't working with the countdown display