CLIQ® Control Key (C-Key) FunctionThe 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. Applications Each 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). Features Update key authorization lists within cylinders Transfers audit trail information from cylinder to software Facilitates secured access to the software Specifications IP67 Temperature range: -20°C - +60°C Encrypted (3DES) communication between C-key and software Encrypted (3DES) communication between C-key and cylinder Powered by a CR2032 lithium battery, which is easily replaced Battery lifetime: 2 years Design: MCK - Black with red inserts; NCK - Black with red and yellow insert Click here to view the full product catalogue You might also be interested in CLIQ® Remote Wall Programming Device CLIQ® Cylinder CLIQ®. Simple. Secure. Convenient.