The wireless transmitter interface for push buttons or switches converts the push-button or switching contacts into a wireless telegram: - When connecting up to four push buttons: the wireless telegram is being sent as long as the push button is pressed (max. 10 s). - When connecting up to two switches: the wireless telegram will be sent as soon as the contact is closed. When the contact is opened, a new telegram is sent. Any programming can be assigned when closing or opening the contact. In combination with the Niko Home Control USB RF interface (410-00099), the hand-held transmitter can also be used in Niko Home Control installations.