Reason for being "as is": There is a lamp malfunction where the NumLock lamp constantly blinks when the power is turned on. Apparently, it's supposed to blink when the battery is low, but it continues to blink even with new batteries. The outer box (package) has a crack. Please understand and consider this. The numeric keypad functions, such as key input, worked without any problems. Elecom Wireless Numeric Keypad Keyboard Ultra-thin Connection method: USB wireless receiver Model number: TK-TDP019BK Includes: Main unit, USB wireless receiver, instruction manual, AAA batteries Batteries are included, so it can be used immediately. Contents: Main unit, instruction manual Shipping: Yu-Packet Post, simple packaging