Product: Bald Technologies PT Pen

The PT Pen by Bald Technologies allows laptop users to make markups and annotations directly on their screens. A receiving station attached by a magnet to the top or side edge of the laptop connects to the computer via USB. Powered by a rechargeable lithium-polymer battery, the digital pen is compatible with PC and Mac laptops and works on screen sizes up to 16″ with a 1,200-dpi resolution. • baldtechnologies.com

About the Author

Wanda Lau

Wanda Lau, LEED AP, is the former executive editor of ARCHITECT magazine. Along with 10 years of experience in architecture, engineering, and construction management, she holds a B.S. in civil engineering from Michigan State University, an S.M. in building technology from MIT, and an M.A. in journalism from Syracuse University's Newhouse School. Her work appears in several journals, books, and magazines, including Men's Health, ASID Icon, and University Business. Follow her on Twitter.

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