Quantum Tunneling Device

Note: The miniature black hole power generator contains no user-serviceable parts.

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Invented at ThinkGeek

Quantum Tunneling Device

Feel confident carrying out routine maintenance, restoration, and servicing of your Aperture Science Handheld Portal Device with this ultimate guide for the do-it-yourselfer. Covers principles of operation, troubleshooting, and modifications with easy to follow step-by-step instructions. Includes information for models 1947 forward, including the standard ASHPD, the F-22, the A-12, and the 122-7605.

The cover of a Haynes manual for your Portal Device printed on a royal blue, 100% cotton shirt. Machine wash cold. Tumble dry low or lay flat to dry. Imported.

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