Features: 1.23 Full Size Keys: The number pad has 23 full size number keys, easy to identify, suitable for data entry and improve accuracy 2.Convenient and Practical: The number pad contains backspace key, one key home key, tab key, e mail key, one key calculator key and number lock, suitable for accounting 3.Comfortable Touch: The number pad is ergonomically designed to avoid wrist strain. Just plug in the USB to use, no drivers or installation required 4.Low Noise: Membrane key switches can reduce typing noise, improve response. Has a life span of 5 million keystrokes 5.Scope of Application: suitable for laptops and desktop computers with for Win 2000, for Win XP, for Win Vista, for Win 7, for Win 8, for Win 10 or for Linux operating systems specification:Item Type: Number Pad Material: ABS Installation Method: Plug and Play Without Driver Product Name: Multifunctional Numeric Keyboard Wire Length: Approx. 1.5meters/1.6yd Number of Keys: Multifunction 23 Keys Connection Method: USB2.0 Wired Connection Button Life: 20 Million Times System Requirements: For Win XP, for Win 7, for Win 8, for Win 10 PackageList: 1 x NumberPad 1 x User Manual