2.4G Wireles: 18 Keys keypad use advanced 2.4G wireless technology, plug and play, no additional drivers required. Signal transmission stability, working range up to 33ft.Comfortable to Use: Ergonomically designed keyboard provides comfort which helps reduce strain. The great spring action and comfortable key sizes respond quickly, improving your work efficiency.Anti Slip: There are non slip mats on the back of the number keyboard, which prevents it from sliding around your desk.Portable: Powered by 1pc AAA battery, which is not included. Compact and easy to carry, great for those working on spreadsheets, accounting files or financial applications.Universal: Compatible with PC, laptop and desktop computers that have 2000 or XP or Vista or 7 or 8 or 10 systems.Keys:18 KeysPower Supply:1 x AAA Batteries (Not included)Interface:USB 2.0Colour:A:BlackMaterial:ABSPackage Contents:1 x 2.4G Wireless Digital KeyboardOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.