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(AB) Auto Brightness Control Option:
The Auto Brightness option automatically adjusts the display intensity as
ambient lighting conditions change. This feature is useful in areas such as
video conferencing centers, film rooms, and others. The amount of dimming
resulting from the ambient light level is fully adjustable. Manual digital brightness
control is included with every BRG digital clock.
Auto-brightness is available for all numeric displays, but not alpha-numeric displays, such as zone lettering or calendar month and day-of-the-week. When ordering this option, simply add the letters AB to the clock model number, i.e. BRG440-AB |
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more information.