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MODEL #280 
12” NUMERALS WATERPROOF  
GPS WALL CLOCK

2018 USER’S MANUAL

BIGTIMECLOCKS

• Connect  the  power  cable  on  bottom  of  the  clock  and  screw  in  tightly.  Press  the  power  on/off 

switch. Remote control uses A23 12 volt battery  

• Press A once and 00:00 is flashing, then press B to choose either 12/24hour, press C to save  
• Press A twice, to change the Hour, use B and C as UP and DOWN key  
• Press A three times to change Minute, also use B and C to increase or decrease . Press C to 

save.  

• The clock has internal GPS. Set the clock initially to the correct time. Then select time zone and 

after a short period the clock will adjust to accurate time. When placed outdoors the clock should 

have no problem receiving the satellite GPS signal. However if using indoors place near a window 

and experiment in different places if you do not receive the GPS signal to automatically adjust to 

the correct time.

1-702 726-9030

info@bigtimeclocks.biz

www.bigtimeclocks.biz

Press A four times, and it shows “on:20”,  
Press B to turn GPS ON .You can choose “On” or “Off”  
When "On:20 is flashing, use Button B to choose different time zone and press C to save as 

follows:  
US East 

 

 

On:20  

US Central 

   

On:19  

US Mountain

   

On:18  

US West 

 

 

On:17  

2. SETTING GPS

1. OVERVIEW

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