BD21 is a quiet and rapid actuator, having a speed up to 42mm/s under 1500N, and with its speed well-maintained either with or without load. It features its two mounting points at both tube front and gearbox, while the spindle nut steers the movement parts of furniture. Users can also choose front end outlet or rear end outlet according to their needs. BD21 is very suitable for furniture applications, such as electric recliner sofa.