|   The Globalsat BR-355 GPS receiver is directly compatible with the NCV2.1-14 and NCV2.1-18 nixie clocks. Just plug it in and it will be detected automatically by the clock's firmware. GPS receiver is WAAS compatible, based on SIRF-3 chipset, has magnetic bottom for an easy fixing, has waterproof case so it can be placed outdoors.
 This GPS receiver will add an absolutely accuracy for your clock.
 
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