Laptops are portable computers that contain most of the same components as desktop computers, including a display, keyboard, pointing device, and speakers in a single compact unit. Common laptop features include an integrated display screen, keyboard, battery power source, ports and slots, and status indicators. Laptop processors are designed to use less power and create less heat than desktop processors. Laptop displays are built-in LCD, LED, OLED or plasma screens that can range in size from 7 to 20 inches. Laptops communicate using wireless technologies like Bluetooth, infrared, cellular networks and Wi-Fi.