This is a 1ft USB A 2.0 male to Micro-USB B 2.0 male black cable. It allows your standard USB A 2.0 equipped laptop, PC, or USB charger to connect to any micro-USB B 2.0 equipped device, such as a smart phone, tablet or MP3 player. The USB A 2.0 connector also grants backwards compatibility to any USB 1.x (A) equipped device. Our cables are backed by a 3 year warranty and are guaranteed to work the first time.