Targus Mobile Numeric 19-Key Keypad with 2-port Hub: * 2 products in 1: Standard keypad plus two extra USB 1.1 ports for accessories like mice, keyboards, presenters and webcams * Faster data input: Low-profile keys for convenient data input - ideal for spreadsheet, accounting and financial applications * Plug and play connectivity: Easy to install - simply plug into your notebook computer"s USB slot - no drivers required * Color: Silver * Other: 19-key layout * Size: 3.5" x 5.25" x 0.625" * System Requirements: Windows 2000, Me, Vista TM, or XP, OS X v10.3.9 or later, USB v1.1 compliant port * Warranty: Limited One year Warranty * Weight: 3.8 oz