Technical Support
Help from the engineers who build your clocks
Search our guides, download documents, or raise a support request — our technical team responds directly.
Knowledge base
Choosing the right digit height for your viewing distance
Rule-of-thumb guide to choosing 4", 6", 8" or larger digits based on how far away your clock will…
GPS clock antenna placement: best practicesWhere to place a GPS clock antenna for a quick, reliable satellite lock.
GPS vs WiFi vs NTP vs RTC: which synchronization is right for you?A side-by-side comparison of Skylink synchronization technologies.
Understanding Skylink model numbersHow to read a Skylink model number such as SL-104-IN-G.
Troubleshooting: clock showing the wrong timeQuick checks when a Skylink clock shows the wrong time.
Frequently asked questions
How do I find my model number?
It is printed on the label on the back of the clock and on your invoice, in the format SL-ABC-XX-Y (for example SL-156-ING-R).
My GPS clock is not showing the correct time. What should I check?
Make sure the antenna has a clear view of the sky (near a window or outside), check the antenna cable connection, confirm the Local Time/GMT setting, and allow a few minutes after power-up for the first lock.
How do I switch between 12-hour and 24-hour format?
12/24-hour mode is selectable on Skylink clocks — follow the steps in your user manual, or contact us with your model number.
What is covered by the warranty?
Manufacturing defects under normal use, for the period stated on the product page and invoice. Breakage and liquid damage are not covered.
How do I report a damaged delivery?
Report it within 48 hours of delivery with photos/videos — from My Account → Returns, or via the support form below.
Can I get datasheets or compliance documents for a tender?
Yes. Request them using the support form or email sales@skylinkclocks.com with the model numbers.
Raise a support request
Please include your model number, serial number and, if possible, photos or a short video of the issue.