Specification: Product Type: 2.4G wireless/wired numeric keyboard Button life: more than 10 million times Battery: 1.5V Product size: 133*128*22mm Packing size: 138*130*25mm Net weight: 85g Gross weight: 102g Support system: for windowns98 / 95 / NT / ME / 2000 / XP / Vista / 7.0 / 8.0 Shell material: ABS Color:black,white Modulation method: GFSK Wired keyboard power: 1 x AAA battery (not included) Working current: 5mA (MAX) Sleep current: 0.5mA Effective distance: about 32.9FT (10M) reachability Temperature: 5℃-50℃ Humidity: 10%-85%RH 25 degrees Celsius ​Features: USB 2.0 wired/wireless technology, plug and play, no device driver, stable signal transmission, no delay digital keyboard, TPE-protection line, maximum working 1.25m. 18-key full-size concave 10-key design, suitable for laptops, banks, schools, companies, etc. The keycaps of the numeric keyboard have a life span of more than 10 million times. ABS material, small and slim design, the numeric keyboard is easy to carry around, the numeric keyboard is easy to press and silent, the back ergonomic tilt and anti-skid pad provide the best comfort. No battery required, automatically enters sleep/sleep mode, saves power and prolongs service life, don’t worry about running out of power on your laptop's numeric keypad. There are two color options, you can choose the one you like best according to your hobbies and needs. You can choose to give it as a gift to a businessman, such as an accountant. Package Included: 1 x Numeric Keypad notes: 1. Due to manual measurement, please allow a difference of 1-3 cm, and the difference between different colors, please allow 3-5 grams. 2. Due to screen differences, the color may be slightly different from what you expect, please allow. 1.18-key Enhanced Layout: For the needs of large data input workers, suit the movement of the human hand between the main keyboard and the numeric keypad of the computer. 2.The asynchronous independent chip does not interfere with the main keyboard of the computer, and there is no need to switch back and forth. It is convenient and quick to operate the main keyboard with one hand and the numeric keyboard with another hand. 3.Wired Multifunctional Numeric Keypad: The laptop scissors foot button structure makes it feel comfortable. With equal sign, left and right parentheses, Esc, Tab, backspace, delete key, computer shortcut, and currency symbol key which meet most needs of inputing. 4.Ultra-thin and minimalist design, easy to carry, stylish and beautiful. The characters are clear and not easy to wear out. USB excuse, plug and play. 5. 18 keys numeric keypad is suitable for laptop users, banking, financial securities, business workers or Used with 87 keyboards, 82 keyboards, 68 keyboards, 61 keyboards and other keyboards without numeric section.