Cheap Trackball Mouse

enjoy it :p

Step 1: The Material

scissors

cutter

wired mouse

mini roll on(with plastic ball)

double sided ducktape

Step 2: Mini Trackball

cut the neck mini roll on

Step 3: Attachment

pairs of duct tape in the mouse

plug the mini roll on

do not forget to adjust before installing mini trackball

finish :p

Step 4: How to Use

see image

use the mouse finger a little more comfortable for these systems