Sanwa Supply Wireless Silent Keyboard (2.4GHz Wireless with Numeric Keypad) SKB-WL37BK

This is a quiet type with significantly quieter key touch noise than conventional membrane keyboards. Ideal for late-night computer work or in public facilities. It is a frequency [2.4GHz] type with a long radio wave range. It can operate from a distance of 10m. It has a mini-sized receiver that does not get in the way when connected to USB. It is a keyboard with a standard Japanese 109A layout.