Features: 1.2.4GHz Wireless: The number keyboard adopts 2.4GHz wireless technology, plug and play, and no device driver is needed, so you can use it with confidence. 2.22 Keys: Wireless numeric keypad adopts 22 keys professional design and is suitable for banks, schools, companies, etc. 3.Stable Transmission: USB mouse numeric keypad ensures stable signal transmission, which is a digital keyboard without delay and has an effective transmission distance of 10m. 4.Wide Compatibility: Number pad mouse combo is compatible with for Android tablet,for Linux,for Win XP,for Win Vista,for Win 7,for Win 8 and for Win 10 series. 5.ABS Material: The wireless number pad mouse combo is made of ABS material, which is durable, compact and slim, and easy to carry. specification:Item Type: Number Pad Mouse Combo Material: ABS Connection Mode: 2.4G Wireless Effective Distance:10m Number of Keys: 22 Keys Mouse Resolution: 1200DPI Battery Type: 1 x AAA (Keyboard) ,1 x AA (Mouse) Alkaline Battery (not Included) PackageList:1 xNumberPad 1 x Mouse 1 x Receiver 1 x User Manual NoteShipping without batteries.