Blum says its motion support Servo-Drive Uno for the Aventos lift system opens with a single touch and closes silently and effortlessly with Blumotion. Powered by the 12-watt Blum power supply, a button, placed in easy reach, closes the cabinet and the lift system can be opened or closed by hand at any time, in the case of a power outage. Servo-Drive Uno for Aventos is compatible with HF, HS, HL, and HK lift systems and can be used with a bi-fold door or one that swings up and over the cabinet.