Aluminum alloyThe product is made of highquality aluminum alloy material, which is beautiful and feels good in the hand. Fullsize 28 keys with Numlock, Delete, TabbMoreUse the wireless keyboard with 28 function keys including backspace, home, end, tab and more to help with accounting tasks, ecel spreadsheets and more to expand your existing keyboard. CompatibilityWidely compatible with mobile phone tablet PC laptop with for Android Windows 200098 P Vista 7 810 system. NOTE This number pad is NOT fully compatible with for OS system and iOS system, calculator key and function keys home, end, Pgup, PgDn and arrows can not work other numbers and keys including ESC, Tabb work. BluetoothWired Dual ModeBluetooth 3.0 technology provides a cable and clutterfree connection, operating distance 10m. It also supports wired connection Advanced sas switchThis sas switch keyboard gives you a comfortable and pleasant typing experience. N970 with USB3.0 HUBIn addition to being used as a numeric keypad, it can also be used as a HUB. The two expansion interfaces are USB3.0, which transmits 5Gbps per second and is compatible with a variety of devices.N960 no USB HUBSPECIFICATIONNumber of keys 28 keysSwitch Sa switchBattery required 140mAh lithium batteryColor blackMaterial Aluminum alloySize 12110012.5 mmPackage Contents1Numeric KeyboardOnly the above package content, other products are not included.Note Light and different displays may cause the color of the item in the picture a little different from the real thing. The allowable measurement error is13cm.