Features 1、2.4GHz Wireless: The number pad uses 2.4GHz wireless technology, plug and play, no device driver, can be used with confidence 2、22 Keys: The number keypad is a full size 22 key keypad, professionally designed, suitable for laptops, banks, schools, companies, etc 3、ABS Material: The number keypad is made of ABS material, the compact and slim design is suitable for the numeric keypad and easy to carry around 4、Stable Transmission: The number pad ensures stable signal transmission, which is a delay free number pad 5、Wide Compatible: The wireless number pad compatible with for Android Tablet, for Linux, Desktop, for Win XP, for Win Vista, for Win 7, for Win 8, for Win 10 series Specification Item Type: Number Pad Material: ABS Interface: USB Connection Method: 2.4G Wireless Effective Distance: Approx. 10meters/10.9yd Number of Keys: 22 Keys Battery Type: 1 x AAA Alkaline Battery (delivered without battery) Support System: For Win, for Android, for OS X and Other Systems Package List 1 x Number Pad 1 x Receiver 1 x User Manual