User key TQ407 Double-secured locking and access control. PROTEC² CLIQ dynamic key is intended for cases when access rights often change as it is easy to program changed access rights directly to user keys. Authorised cylinder and/or cylinder groups needs to be programmed to dynamic keys via customer software (locally or remotely). Patented PROTEC² (T) key system. Specifications Type of product Key Key length Standard ATEX approval No Patent valid Yes CLIQ cylinder group No Key type Electromechanical Platform PROTEC2 CLIQ Close Programming key TQ403EXPROTEC² CLIQ programming key for ATEX locking systems. User key TQ406PROTEC² CLIQ normal user key. User key TQB406EXPROTEC² CLIQ normal user key. ATEX approved.