4-digit 7-segment displays are really neat little devices, it's a shame that they can be so cumbersome to control. 

This is a basic common cathode 4 digit seven segment display. Great for creating a stop watch or displaying numbers.

Features:

• Pin count: 21
• Digit Number: 4 digits
• Common cathode
• Digit Height: 0.56 inch / 1.4 cm
• Size (L x W): 2 x 0.75 inch / 5 x 1.9 cm