1.[Convenient]Wireless asynchronous, no switching, can be used simultaneously with the keyboard without conflict.2. [Lightweight and stylish]compact and convenient, convenient to store and save space, suitable for business travel.3.[Simple setup]it's easy to get started, just plug the receiver into a USB port and start crunching numbers right . No drivers required. Keys are easy and silent to press, greatly speed up your productivity 4. [Waterproof design] Ultra-thin chocolate buttons are used, which are soft and comfortable to Press.5.[Compatibility]Works with PC and desktop computers that have Windows 2000/ XP/ Vista/ 7/ 8/ 10 operating systems,Bluetooth wireless chocolate numeric keypadBluetooth version: 30: more than 10 million timesBattery: 15 VWeight: 102gSupport system: three systems IOS, , WINDOWSsize:140x85x10mmMaterial:ABScolour:BlackPackage Contents:1 x keyboard1 x English manualOnly 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 measurement allowed error is +/- 1-3cm.