4x7 segment led display

Description:

The 4-digit red LED display module, each with 7 segments, is useful in electronic assemblies where digits must be displayed. Being 4 digits is useful for displaying time or timer.
The module has a common connection for each digit of the LED anode.

Specifications:

LED voltage drops: 2V - 2.2V;
Recommended voltage drop on LED: 2.1V;
Current Current: 20mA;
Wavelength: 640nm;
Operating temperature: -25 ° C to + 85 ° C;
Light intensity: 55mcd.

Dimensions: 50mm x 19mm x 5mm

Package Included:

1 x Display LED 4x7 Segments

Practical example:

Instructions and Practical Example:  http://nicuflorica.blogspot.ro/2013/07/afisaje-led-cu-7-segmente-si-arduino-ii.html