The SMC D-H7PW Solid State 3-Wire DC5-24V Auto Switch is a reliable and efficient switch designed for use in electrical equipment and supplies. With a solid-state design, it offers consistent performance and durability. The unit quantity is 1, making it suitable for various applications where a dependable auto switch is needed. The SMC brand ensures quality and trustworthiness in this product, making it a valuable addition to any industrial or commercial setting.