Features: 1. Plug-and-Play - no drive required USB port required. 2. Universal for computers systems like WindownsXP 7.0 or 8.0 or 10 etc 3. Spill resistant and dust proof. 4. Tihis mini digital keyboard is best for notebook users who work with number keys for long. 5. Light weight and compact design makes it both nice and practical. Great for those working on spreadsheets, accounting files or financial applications. Never miss it! Package Includes: 1 x 2.4G 18 keys Wireless Digital Keypad Specifications: Connection:USB2.0 Wired Cable Length:approx 1.5M or 4.92ft Item Size: approx 147x90x18mm or 5.79x3.54x0.71in Material: ABSandElectronics Color: Black Number of Keys: 23 keys Clicks: More than 20Million Times note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!