- Battery technology: Lithium ion
- Battery capacity: 6600 mAh
- Battery voltage: 11.1 V DC
- Colour: Grey
2Power Main Battery Pack 111V 6900mAh Panasonic ToughBook CF29 CF51 Compatible Part CFVZSU29 CBI1017A Laptops Laptop Battery
The portable and sturdy GHB wireless numeric keypad with receiver provides you with convenient use-just plug the receiver into the USB port, No device drivers are required.
You will love it after one use!
Besides accountant, every notebook or laptop pro will become dependent on the numeric keypad after one try! Use it, you will find your work efficiency and productivity improved greatly!
Easy to use：
1.Open the rear cover of the keyboard, install one AAA battery(Not included the package, Note the positive and negative directions).
2.Insert the receiver to the device’s USB interface, and then computer will install the driver
automatically, Finally, you can use this Numeric Keypad.
1 x 2.4G Wireless Numeric Keypad Black
1 x Wireless USB
1 x User Manual
1.AAA battery is not included.
2.When the red light blinks，it indicates the battery is low, please kindly replace the battery.
This numeric keypad may not fully compatible with Mac system. (Function keys do not work, while numeric part works fine.)
Why do we count the way we do? What is a prime number or a friendly, perfect, or weird one? How many are there and who has found the largest yet known? What is the Baffling Law of Benford and can you really believe it? Do most numbers you meet in every day life really begin with a 1, 2, or 3? What is so special about 6174? Can cubes, as well as squares, be magic? What secrets lie hidden in decimals? How do we count the infinite, and is one infinity really larger than another? These and many other fascinating questions about the familiar 1, 2, and 3 are collected in this adventure into the world of numbers. Both entertaining and informative, A Number for Your Thoughts: Facts and Speculations about Numbers from Euclid to the Latest Computers contains a collection of the most interesting facts and speculations about numbers from the time of Euclid to the most recent computer research. Requiring little or no prior knowledge of mathematics, the book takes the reader from the origins of counting to number problems that have baffled the world’s greatest experts for centuries, and from the simplest notions of elementary number properties all the way to counting the infinite.