Squared one: HM3000-B5 Air humidifier 3L - Coverage: Up to 40 m2 (430 sq ft), perfect for bedrooms or office spaces. - Runtime: Operates between 8 to 14 continuous hours depending on mist level settings. - Key Features: Features a 360-degree direction-adjustable nozzle, a manual mist intensity control knob, and a dedicated compartment/tray for essential fragrance oils. - Filtration: Equipped with a built-in water purification filter to reduce scale and impurities. Long one: BLACK+DECKER HM4125-B5 Cool & Warm Mist Humidifier (4L) -Coverage: Up to 40 m2, featuring a 30W high-performance system. -Design & Fill: Crafted with a modern matte finish and a decorative wood trim; uses an easy top-fill square tank layout. -Controls: Includes stepless mist modulation (up to 350 ml/h), up to 80% automatic humidity targets, a 12-hour timer, and a silent sleep mode.