YOU ARE BUYING A MICROSOFT TRACKBALL EXPLORER 1.0 (X05-87473) PS2/USB COMPATIBLE MOUSE. IT HAS BEEN TESTED AND EVERYTHING WORKS AS IT SHOULD. THE RED MARBLE TRACKBALL IS NOT SECURED IN THE HOLE (IT FALLS OUT). IT STILL ROLLS WITH EASE AND WORKS AS IT SHOULD. THE USB CONNECTION WIRE IS IN GOOD CONDITION. THERE ARE SOME LIGHT SCRATCHES, DUST/DIRT AND SCUFF MARKS THROUGHOUT. THERE IS A CHIP ON THE TOP LEFT BUTTON (NOTED IN PICTURES). PLEASE LOOK AT PICTURES CLOSELY FOR MORE DETAILS OF CONDITION AND REACH OUT WITH ANY QUESTIONS. 

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