what is a retractable optical mouse?

Answer:

It's a mouse where on earth the cord retracts into the mouse itself, much like the power cords on most vacuum cleaners, you can also verbs out the cord to whatever length you requirement so you don't have one long cord as you do on a non-retractable mouse cord. For standard use however, I think a wireless mouse is the best approach to go, you enjoy a small transmitter that plugs into your USB port and you eliminate the rope altogether. Mine operates on one AA freestyle that last almost six months. For me, I think it's the individual way to progress, no more wires!
it is a mouse.the wire of the mouse connecting to the computer/laptop.you can after using mouse put the telecommunication inside the mouse so the wire don't break.

CONCLUSION:

The retractable cable of the mouse make it the most versatile mouse.after using the mouse the chain hides without fault inside the mouse!!