The company announced two Surface tablet models, one running Windows 8 Pro and one with Windows 8 RT, engadget.com reported.
The RT model has a 10.6-inch display, is 9.3 millimeters thick, weighs 1.3 pounds and is powered by a NVIDIA ARM chip, engadget.com reported.
The slightly larger Windows 8 model is 13.5 millimeters thick, weighs 1.9 pounds and runs an Ivy Bridge Core i5 processor.
Both models will be available with magnetically-attachable covers that feature keyboards.
Microsoft did not discuss pricing and availability, going only as far to say prices will be "on par with Ultrabook-class PCs" for the Windows 8 Surface, which will be available about three months after the Windows 8 launch.
The RT model will be available at around that launch time, the company said.