Genuine Logitech M-CW47 Ergonomic MouseMan PS/2 Scroll Wheel 4 Button Ball Mouse, Works With Any Computer System That Supports a PS/2 Connection, Compatible Dell Part Number: 3362D Genuine Logitech Ergonomic MouseMan Wheel PS/2 Ball Mouse Dell P/N: 3362D Logitech Part Number: M-CW47 PS/2 Connectivity Scroll Wheel 4 Buttons Ergonomic Design