ACK-185 U • Numeric keypad with built-in calculator and 2-port USB-hub • Patented “Non-Sync Num Lock” function • Further functions, e.g. 12-digit display, double-zero key (00), percentage and tax calculation, memory functionality, as well as direct transmission of the calculation result to the PC at the stroke of a key • High-quality “Soft-Touch” membrane technology • Power supply via USB or integrated solar cell with backup battery • Plug & Play installation