Brand: Edifier. MPN: EEC4006999. Full Range Sound - The 2.75-inch full-range unit delivers excellent sound with a compact footprint   USB Powered - Single USB connection both powers and streams audio   PC and Mac compatible - The build-in sound card allows you to connect to your PC and Mac via a single USB cable   Wireless Audio - Bluetooth 5.3 enables faster connection and stable audio transmission to your phones and tables   Perfect for School, Office, Meeting roo settings, all you need is a laptop or mobile device to enjoy room filling sound