Lenovo Genuine 45J4889 M-U0025-O USB 2-Button Black Red Scroll Wheel Computer PC Optical Mouse Compatible Part Numbers: 45J4888, 25011476, 45J4889, M-U0025-O Genuine Lenovo USB 2-Button Black Red Scroll Wheel Computer Optical Mouse 2-Button | Scroll Wheel Connector: USB Wired Color: Black / Red Compatible Part Numbers: 45J4888, 25011476, 45J4889, M-U0025-O