Time Setting The professional LEDI® clocks can display the same time information, synchronized by a master clock or a time server. Internal time base The LEDI® clock has its own temperature compensated TCXO time base which allows an accuracy about 0.1 sec/day between 0° et 40°C in case of synchronization loss. Security Backup of time information in case of mains absence, by lithium battery : 10 years Key feature Perfectly silent, direct and accurate reading of time. SMD bi-colour LED technology allows changing each time zone colour independently in red, green or yellow (optional: white or blue). The patented technology of the light guide provides a perfect regularity of the brightness and viewing angle at 160°. The front face of the LEDI® is coated with an antiglare and antiscratch film giving an extraordinary 60000:1 level of contrast. A protection against over-voltage and industrial interference via EMC filter. An easy "plug-and-play" installation. Anodized aluminum case: Wall mount (screw lock) or flush mount. Its participation in the sustainable development, life span over 20 years. 2 years warranty