Features: Plug-and-Play --no drive required; USB port required. Universal for computers systems like WindownsXP 7.0/8.0/10 etc Spill resistant and dust-proof. Tihis mini digital keyboard is best for notebook users who work with number keys for long. 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 ! Specifications: Model: XKB-01 Connection:USB Wired Item Size: approx 149x90x18.5mm/5.87x3.54x0.73in Material: ABS+Electronics Color: Black Number of Keys: 23 keys Package Includes: 1 x 2.4G 18 keys Wireless Digital Keypad 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!