Sennheiser SZI 1015 infrared power radiator used in professional IR audio distribution systems such as conference rooms, courtrooms, churches, museums, and assisted listening installations. This unit transmits audio via infrared light to compatible Sennheiser IR receivers. Rated for 25–35V DC at 0.75A. Made in Germany. Unit shows cosmetic wear from prior use but was removed from a professional installation. Surplus equipment – no further testing performed. Sold as pictured.