Features: Plug and Play: USB wired connection via USB port, no drivers needed, plug and play. User-friendly: Full-size 19 keys number pad, including a powerful "000" key, greatly improve work efficiency. Comfotable: Integrated ergonomic tilt reduces strain, great for those working on spreadsheets, accounting files or financial applications. Mechanical Feel: Suspended keycaps provides mechanical feel keystroke. Curved surface fits the shape of your finger and ensures comfortable typing. Water-proof: Crater design keycaps are higher than the bottom board, no need to worry about splashing water by accident. Note: Please do not immerse the keypad into water. Specification: Case Material: ABS Connector: USB wired Number of Key: 19 keys Keycaps Life: more than 10 million times Application: Desktop, Laptop, Notebook System Supported: for Windows / Android / Mac OS Rating: 5V / 0.25A Color: Black Cable Length: 1.5m / 4.92ft Main Item Size: 13.5 * 8.7 * 3.3cm / 5.31 * 3.42 * 1.30in Main Item Weight: 115g / 4.05oz Package Size: 14.5 * 11.5 * 3.9cm / 5.70 * 4.52 * 1.53in Package Weight: 150g / 5.29oz Package List: 1 * USB Wired Numeric Keypad