Radio Technology Somfy (RTS) 3-wire motor technology allows wireless radio control of motorized window coverings via the RTS family of controls. RTS includes the Atus and the Sonesse variations. Somfy LS40 RTS Altus 3-wire 120v motors offer a torque rating of 4nm 36" lbs. or 9Nm 79"lbs. and a motor speed of 18-36 RPM. Alternatively, the Sonesse 40 motor technology provides aesthetic appeal and precision but with an ultra-quiet process.