The retractability of the cord is handy especially for my MP3 player with external speaker which I have permanently plugged into a power bank. This cord helped me got rid of the dangling wire. When the cord is extended to its back it is 36" long. To retract it from that position you need to yank on both end to trigger the retracting mechanism.
Current monitor results:
black cord: 1.02A / 5.05V (excellent)
white cord: 1.02A / 5.09V (excellent)
(for comparison this is on par with the best charging monitor result for this phone 1.00A/5V)
You can find it on Amazon by following this link.
Ali Julia review ★★★★★