SOMFY’s Chronis RTS Timer is a wireless digital timer compatible with all the RTS Motors and externally mounted RTS Receivers such as the Centralis. It will automatically raise and lower window treatments based on the pre-set time of day. The Chronis can be programmed to operate at the same time each day or different times every day. It has a security function that will raise or lower shades randomly to give the impression of an occupied home. Commands are transmitted via radio, so external wiring is not necessary.