Item Type: Number Pad <br>Material: ABS <br>Interface: USB <br>Connection Method: 2.4G Wireless <br>Effective Distance: Approx. 10meters/10.9yd <br>Number of Keys: 22 Keys <br>Battery Type: 1 x AAA Alkaline Battery (delivered without battery) <br>Support System: For Win, for Android, for OS X and Other Systems1、2.4GHz Wireless: The number pad uses 2.4GHz wireless technology, plug and play, no device driver, can be used with confidence <br>2、22 Keys: The number keypad is a full size 22 key keypad, professionally designed, suitable for laptops, banks, schools, companies, etc <br>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 <br>4、Stable Transmission: The number pad ensures stable signal transmission, which is a delay free number pad <br>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 seriesShipped Without Battery<p>1 x&nbsp;Number&nbsp;Pad</p><p>1 x Receiver</p><p>1 x User Manual</p>