The Elta 149-MTS10 is a 3‑speed manual control switch (MTS) designed for adjusting fan operation across three speed levels. Suitable for both surface and flush mounting, it offers flexibility in installation and is ideal for a variety of ventilation systems. With an IP44 protection rating, it ensures resistance against dust and moisture, making it suitable for use in moderately exposed environments. This switch is rated for a maximum ambient temperature of 50°C and comes with VDE certification for safety and reliability.