Merk : M-Tech Type : Wireless Numeric Key Pad Wireless Technology : 2.4Ghz Wireless Distance : 10 meter Button Quantity : 20 buttons + 3 office buttons Dimension : 150 L x 90 W x 30mm H Input Power : 1x AAA Battery
System Hardware Requipment : PC with USB 2.0 Port Windows 10 / 8 / 7 / Vista / XP MAC OS