An armrest locking device for preventing unintentional unlocking thereof upon a car crash is disclosed. The device comprises: a case; a speaker port; an antenna located in the bottom of the case; and a spacer located on the front of the case for resting against a cheek of a user of the device. The present invention further relates to extracts which are isolated from different parts of Cissus quadrangularis plant, the preparation of such extracts, the medicaments containing said extracts, and the use of these extracts and constituents for the preparation of a medicament. The intermediary device and the second computing device establish the private tunnel with one another over the network. In executing the object, the object information is read from the storage and executes the object if the object has a load that is lower than a predetermined threshold value.