Manhattan Numeric Keypad, Wireless (2.4GHz), USB-A Micro Receiver, 18 Full Size Keys, Black, Membrane Key Switches, Auto Power Management, Range 10m, AAA Battery (included), Windows and Mac, Three Year Warranty, Blister. Device interface: RF Wireless, Keyboard number of keys: 18, Purpose: Notebook/PC. Product colour: Black. Weight: 90 g