Hewlett Packard HP two-button trackball mouse with scrolling wheel and cable. Model # N3 Ball. Part # 5187-2149. Designed for use with compatible PCs, such as HP Pavilion a750y, etc. (Seller cannot vouch for compatibility with other PCs. Please contact manufacturers for compatibility information.) Used but clean; buttons show surface wear but this surface wear does not impact performance. Mouse and all its functions are in perfect working condition.
