It's hard to imagine a Bluetooth Adapter getting any smaller! This micro adapter is essentially just a USB type A plug. This micro adapter features enhanced data transmission up to 3.0Mbps with a working range of up to 330 feet. Its Bluetooth v2.0+EDR technology provides better stability when simultaneously connecting to multiple devices such as a mouse, keyboard, mobile phone and headset. Includes software on a MiniCD. Requires Microsoft Windows 2000+ or Mac OS v.10.1.4+.