1. USB Receiver: This wireless number pad comes with USB receiver to provide reliable wireless connection which is stable and quick in response.2. Semi Mechanical: This numeric keypad adopts 18 keys and semi mechanical structure, offering comfortable hand feel and reducing pressure on wrist.3. High Accuracy: This wireless keypad adopts physical keys that can reduce errors and increase input accuracy at the same time, and the keys are sensitive, stable and quiet.4. Wide Application: This wireless numeric keypad is suitable for accountants, developers, financial personnel and other professions that require a lot of numbers input on computers.5. Battery Powered: This number pad is plug and play, and it's powered by 1 piece of AAA battery(battery no included), offering more convenience.Spec:Item Type: Wireless Number PadMaterial: ABSBattery: 1 x AAA Battery(Battery Not Included)Application: Suitable for Accountants, Developers, Financial Personnel And Other Professions That Require A Lot Of Numbers Input On Computers.packing list:1 xWireless Number Pad1 x USB Receiver