Professional LED clock with tri-color display, robust and stylish combining the best of the technology for an easy installation and operation. Time setting The professional LEDI ® clocks can display the same time information, synchronized by a master clock or a time server. On standalone and pulse version, the time setting i s manual. Display date and time alternately. Internal time base The LEDI ® clock has its own temperature compensated TCXO tim e base which allows an accuracy about 0.1 sec / day betwe en 0° to 40°C in case of synchronization loss. Security Backup of time information in case of mains absence , by lithium battery : 10 years . Key features Perfectly silent , direct and accurate reading of time. SMD bi-colour LED technology allows to change the display colour in red, green or yellow (optional white or b lue). The patented technology of the light guide provides a perfect regularity of the brightness and viewing angle at 1 60 °. The front face of the LEDI ® is coated with an antiglare and anti- scratch film giving an extraordinary 60000 : 1 leve l of contrast. A protection against over-voltage and industrial inte rference via EMC filter. An easy "plug and play" installation . Anodized aluminium case : Double face IP30 Its participation in the sustainable development life span over 20 years. 2 years warranty.