2-Button Ernie USB & PS/2 Optical Kidz Mouse Ernie USB Optical Mouse General Features: Designed with Ernie colors and characters Patented design for small hands Works the way a child's hand works with a squeeze rather than a tap Easy to use, small, and comfortable for little hands 2 Buttons Optical tracking Precise cursor momen USB Connector USB to PS/2 adapter Compatible with MAC and PC Regulatory Approvals: FCC CE ETL VCCI C BSMI