Review on Cable Matters 2-Pack USB 3.0 Coupler Adapter - Female to Female Gender Changer by Anthony Gutierrez

Allows you to connect two male USB 2.0 cables for use as a cable extender. I also purchased a SIENOC USB 2.0 male to micro USB female converter (https://www.amazon.com/dp/B00GIF4E08/ref=cm_cr_ryp_prd_ttl_sol_56) which I use to connect two micro USB cables can to increase the length. This adds tremendous versatility to my existing micro USB sync and charge cables. They are very lightweight so you can easily carry them around so you have them when you need them. And at $9.99 for two, it's an affordable way to add versatility when you need it.