The Ex-Or MR2500DALI M-Wave detector with photo cell and DALI is a lighting accessory designed for use in a variety of lighting setups. This product combines a photo cell with DALI technology to provide a reliable and efficient way to control lighting in a home or commercial setting. The M-Wave detector is specifically designed to detect changes in light levels, making it ideal for use with lighting that needs to be adjusted based on natural light availability. Its compact size and ease of installation make it a practical choice for many lighting applications.