22-KEYS NUMBER KEYPAD: Numeric Keyboard supports NumLock, ESC, Tab, Delete etc. With shortcut key which can open the computer calculator directly. The Muli-Function 22 Keys Wireless external number keypad for laptop is more unique than most keyboards. 2. PORTABLE AND EASY TO USE: Our Number Pad is only 87g. And Numeric Keyboard is work by 2.4GHz wireless technology, Plug and Play. You can just plug the receiver into a USB port . No device drivers needed, no delays and dropouts, fast data transmission. The maximum working range up to 32.8 ft.The Receiver is inserted in the battery compartment of the keyboard 3. MUTE AND TOUCH COMFORTABLE: Made of high quality ABS Material which offer great comfortable touch and precise control, good resilience fast response and reduce the press sound. It also has auto sleep function, lower power consumption, reflect energy saving. Press any key to awake up the keypad. Power Supply by 2 x AAA Battery ( not included ) 4. MULTI-COMPATIBILITY: Wireless numeric pad works with PC, laptop and desktop computers that have Windows 2000 / XP / Vista / 7 / 8 / 10 systems.