100% brand new and high quality Features: Scissor-type switch key design, better mute, fast response. Relieve and reduce work pressure and improve work efficiency, provide a comfortable and quiet office environment. No device drivers needed, no delays and dropouts, fast data transmission. The two expansion interfaces are USB3.0, which transmits 5Gbps per second and is compatible with a variety of devices. Support for Windows, Android, Mac OS systems. Specifications: Material:ABS Color:Gray,Silver(Optional) Size:Approx.100x121x12.5mm/3.94x4.76x0.49in Battery:140mAh Number of Keys: 28 keys Interface:Type-C,USB Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1x Number Keypad