The Lenovo 2.4G Wireless USB Receiver is the perfect and cost-efficient replacement for a lost Lenovo Professional Mouse, Keyboard or Combo USB receiver. Easy to pair with supported devices, just press the pairing button and the mouse or keyboard is usable within seconds.Compatible with:Lenovo Professional Wireless Keyboard & Mouse Combo (4X30H56796)Lenovo Professional Wireless Keyboard (4X30H56841)Lenovo Professional Wireless Laser Mouse (4X30H56886)