CLIQ® Control Key (C-Key) Function The CLIQ® Control Key (C-Key) manages the electronic communication provided by the CLIQ® system.It provides users secure access to the system software and the ability to transfer information between the software and cylinders.ApplicationsEach CLIQ® system must have at least one C-Key, referred to as the Master C-Key (MCK). The MCK is used to transfer information from CLIQ® cylinders to the software and not to open them.For systems with more than one administrator, it is possible to utilize additional C-Keys, also referred to as a Normal C-Key (NCK).FeaturesUpdate key authorization lists within cylindersTransfers audit trail information from cylinder to softwareFacilitates secured access to the softwareSpecificationsIP57Temperature range: -10°C - 80°CEncrypted (3DES) communication between C-key and softwareEncrypted (3DES) communication between C-key and cylinderPowered by a CR2032 lithium battery, which is easily replacedBattery lifetime: 2 yearsDesign: MCK - Black with red inserts; NCK - Black with red and yellow insert CLIQ® Cylinder CLIQ® Waterproof Padlock CLIQ®. Simple. Secure. Convenient.