The Helios KWL-MZB-BE control unit provides easy ventilation management with both manual 4‑step operation and automatic mode options. Designed for flush-mounted installation, it fits neatly into standard wall boxes with compact dimensions of 80 x 80 x 10 mm (W x H x D). Equipped with a 4‑step LED indicator, this user-friendly controller allows precise adjustment of ventilation settings to suit individual needs. Ideal for use with Helios ventilation systems requiring straightforward and intuitive control solutions.