Our XTERNA WIreless time and temperature transmitter allows display of outdoor temperature and GPS time sync, on XTERNA enabled clocks. Our ELITE Class Nixie Clock Kits and current Maestro Kits natively support these functions. To use the XTERNA with other kits below, it is necessary to use this adapter module kit. 
SPECTRUM (firmware V4.0 onwards)
QTC+
HALO CHROMA
NIXIE 5750

If you already have the Xterna transmitter, this adapter will also receive GPS time on all our other clocks that support GPS Time Sync, just set your clock for GPS reception at 4,800 bps.

Assembly instructions here (Scroll to bottom of page)