Somfy Sonesse RTS LS40 404S2 110 volt Round Head Motor. LS40 requires a motor plate adapter, crown an drive are sold separately. Torque 4 Nm (35.2 in.x lb) ,motor speed 36 rpm, unit weight 2.5 lbs. LS40 is a wired motor for all screen and roller blinds or large-size wood or aluminum Venetian blinds. Somfy Sonesse RTS LS40 404S2 110 volt Round Head Motor. LS40 1001636 requires a, motor plate adapter, crown an drive are sold separately. Torque 4 Nm (35.2 in.x lb) ,motor speed 36 rpm, unit weight 2.5 lbs. LS40 is a wired motor for all screen and roller blinds or large-size wood or aluminum Venetian blinds.