Adesso USB Numeric Keypad with built-in Calculator

The Numeric USB Numeric Keypad and Calculator offers desktop and notebook users an instant benefit of a full-sized,
external numeric keypad in a compact form. You will not worry to install drivers as it uses USB Plug-and-Play technology
. It also features a wide LCD screen and additional function keys to use with or without a PC. You can retract the USB
cable and use the built in calculator at anytime. It is slim and portable, definitely designed for mobile professionals.
 
Features:

Large LCD display.

8 calculator functional hot keys: MRC, TAB, %, MODE, M-, M+, +/- and SEND

Support plug and play and hot swapping

Two-Way Power System for calculator mode uses PC power, in addition to one A13 battery (LR41)

Auto power off after 4 minutes from the last key entered.

Selectable Rounding from among floating-point, cut off, round off and Add Mode

Membrane switch with tactile feedback

Defines the number of decimal places: (0,2,4,A)
 
Specification: 

OS Compatibility: Windows Vista/XP/2000/ME/98

Retractable Cable Length: 31.5"

Unit Dimensions: 5.2
"x 3.2
"x 1
"

Package Weight: 0.55 lb.

Keycap Color: Black

Case color: Silver/Black

Hot Keys: 8 calculator functional hot keys

Key Layout: 19 keys.