Zalman specializes in manufacturing and providing a range of cooling solutions and accessories for PCs, including CPU air coolers, CPU liquid coolers, laptop coolers, fans, and PC cases in various sizes such as full tower, mid tower, and mini tower. They also offer power supplies ranging from 300W to 1300W. Additionally, Zalman provides a variety of accessories like audio products, controllers, custom keyboards, mice, mounting kits, multifunction stands, and thermal compounds. The company focuses on innovative cooling technologies and products for PC enthusiasts and gamers.