Hp Compaq 2710p 2730p Tc4200 Tc4400 Stylus Pen Up-719e-53a
for use with hp 2710p may work with other models but came from an hp 2710p
https://m.media-amazon.com/images/I/21qmPLz3qTL._AC_.jpg
https://m.media-amazon.com/images/I/21qmPLz3qTL._AC_US40_.jpg
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HP
{"Brand": "HP", "Manufacturer": "hp", "Is Discontinued By Manufacturer": "No", "Date First Available": "May 30, 2015"}