Fourposition rotary switch for simple, reliable control with four states: Off, L1, L2, L3. Quick, clear selection helps set the exact airflow or speed you need and can reduce energy use. Key benefits Clear function: easy to operate and understand, with distinct levels for precise control. Broad compatibility: suitable for fans, range hoods, and other lowcurrent appliances. Durable material: ABS construction offers impact resistance and heat stability for longterm use. Compact and easy to install: small footprint fits standard control panels and cutouts, simplifying upgrades. Consistent performance: smooth switching and reliable contact for longer service life. Use scenarios Ceiling fan: switch between gentle (L1) and strong (L3) airflow to suit room conditions. Kitchen range hood: adjust ventilation level to match cooking intensity while keeping noise down. Bathroom or workshop vent: quickly change airflow to maintain comfort and air quality as needed.