SUNREED 23 keys wired number pad with calculator function, easy to use, full-featured, with extra 5 keys (Esc, Tab, %, $, =), can meet your living and working requirements, unique anti-error design, fully compatible with Windows, Apple, Android and many other operating systems. It is the best assistants for laptops without a numeric keypad! 

More Features: 
1. Doesn't affect the computer keyboard when the numeric keypad is input and switched. can be used independently of each other. 

2. In the calculator mode, press the "Enter" button to send the calculation result to the terminal device, which is very suitable for scanning mobile payment occasions. 

3. Ergonomic Design: The numeric keypad adopts an ergonomic tilt design to prevent wrist fatigue. 

Num/Clear button function: 
1. Press the "Num/Clear" button (about 3 seconds) can switch between number pad mode and calculator mode. 
2. In the numeric keypad mode, click the Num/Clear button, the indicator light is on, the keyboard screen displays "Num" and "K", you can enter numbers and symbols (white characters); the indicator light is off, the keyboard screen displays "K", and the function key can be input (blue characters) + white characters), such as: up, down, left, right, +, -, *, / 
3. In the calculator mode, clicking the Num/Clear button can clear the screen display at one time. 

Warranty: 12 months! 

Specifications: 
Size: L5.9 * W3.4 * H1.1 inches 
Operating Voltage: 3V-5.5V DC 
Operating Current：30mA(MAX) 
Stroke：2.0+/-0.2MM 
Bounce force：62+/-10gf 
Knocking：80+/-10gf 
Keyswitch Life: 5 million strokes times 
Cable Length: 4.9ft 

Package Contents: 
1 * numeric keypad for Laptop 
1 * User manual 

Any question with the 23 keys Portable USB number pad during usage, please kindly contact us to get the best after-service.