An electric lock device for furniture or storage has an RFID transmitter/receiver for communication with portable data carriers. A controller detects a data carrier nearby, reads a set of data from it, and determines if the data carrier is at least an access requesting or function determining type. If access requesting, the controller retrieves identity information from the read set of data, compares the identity information to stored reference information, and controls an electric activator for a securing member. If function determining, the controller retrieves function determining information from the read set of data and performs any of the following: switching to any of a plurality of operational modes having different principles for access control; reading an operational status; or setting an operational parameter. At least one of these actions is variable controlled and based on a variable value in the function determining information.