Base made of aluminum alloyPossibility to connect with 3 devices simultaneouslyMultimedia HotkeysWireless connection: 2.4GHz, Bluetooth 3.0, Bluetooth 5.0System requirements: Windows XP/Vista/7/8/10/11, MacOS X 10.4 or later, USB connectionIncluded: keyboard, USB receiver, USB chargerWarranty: 2 years