Oregon Scientific MSR939A user manual About Atomic Clock Reception, AC Adaptor

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shows on the clock display when batteries are low or when there are no batteries installed and only the adaptor is connected.

The LED indicator on the motion sensor and vibration alarm will flash in red when the batteries are low.

AC ADAPTOR

The clock / projector and the motion sensor use 6V and 4.5V AC / DC adaptors respectively. (Adaptor for the motion sensor is not included.)

The clock AC adaptor socket is found on the bottom of the clock. The jack can be inserted into the socket as shown below:

The remote sensor jack can be inserted into the socket as shown below:

NOTE The motion sensor has a Power ON / OFF switch to help conserve energy. Use the AC adaptor when using the motion sensor for long periods of time. The batteries are a good power source for back-up use.

ABOUT ATOMIC CLOCK RECEPTION

This clock can automatically synchronize the date and time with an official time-keeping organization in Boulder, Colorado. The unit can pick up an atomic clock signal when it is within 932 miles (1500km) of these locations. For more information on the Atomic Clock, please visit www.nist.gov

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RMR939PA English R5 12 9/21/04, 2:40 PM