Yes, you can use a select group of DJ controllers without a laptop. They are often referred to as standalone DJ systems because they work like other DJ controllers but have their own screens and don’t need a laptop connected. You can also use them with a laptop and their compatible software programs if desired. These standalone systems are often hefty and rather expensive, like the Denon DJ Prime 4 recommended here or the Pioneer DJ XDJ-RX3. There are also smaller and less expensive options like the $699 Numark Mixstream Pro.