Patent ID: 8783574

Claim:
A portable peripheral unit to provide additional electronic functionality when combined with an off-the-shelf host device comprising: a housing with a fixed width having a portion configured to engage with a portion of handheld host devices of various models having distinctly varying sizes; a keyboard module; an attachment mechanism associated with the housing, being used to secure the housing to a handheld host device, to form a handheld apparatus, wherein the attachment mechanism is secured to the host device by selective adjustment to adapt to a variable dimension of the host device; the attachment mechanism including a first set of at least two arms, wherein the first set of at least two arms attach to the handheld host device on substantially opposing side edges; at least one adjustment mechanism including at least one threaded aperture and at least one screw selectively engaged with the at least one threaded aperture to adjust the first set of arms; the at least one adjustment mechanism adapted to move at least one arm of the first set with respect to the other arm of the first set, relative to the fixed width of the housing, for adjustment of a space therebetween.