Plug & Play, easy and convenient. Apply to all computers with a USB interface. Keystroke lives up to 5 million times. Thin and compact design: 18-key wired numeric keypad, mini and portable. Design for accidental water spillage. Anti-slip foot pads greatly protect the keyboard from slipping. Ergonomic design makes it fit for your fingers and wrist, effectively reducing tiredness from long hours. Support for automatic sleep mode, no on / off switch required. The LED indicator lights up when the device is ready for data input. Product description Size: USB It's an ingenious wired number pad, 18 keys, thin and compact. Plug & amp; Play, easy and convenient. Keystroke life is up to 5 million times. Tilt design and non-slip foot pads, make durable. Besides, its mini and portable design is another plus point, which makes it an ideal companion for business trips. Features: Plug & amp; Play, easy and convenient. Apply to all computers with a USB interface. Keystroke life up to 5 million times. Thin and compact design: 18-key wired numeric keypad, mini and portable. Design for accidental water spillage. Non-slip foot pads greatly protect the keyboard from slipping. Ergonomic design makes it fit for your fingers and wrist, effectively reducing tiredness from long hours. Support for automatic hibernation, no on / off switch needed. The LED indicator lights up when the device is ready for data entry. Specification: Material: ABS Number of keys: 18 keys Life key: 5 million Interface: USB Voltage: 5V Current: 0.25A Cable length: 1.35 m Item Size: 8.5 * 14 * 2 cm / 3.35 * 5.51 * 0.79 in (L * W * H) Item Weight: 76g / 2.7 ozPackage size: 14.8 * 9.3 * 3.5cm / 5.83 * 3.66 * 1.38 in (L * W * H) Package weight: 100g / 3.53 ozPackage List: 1 * numeric keypad