I am actually impressed with the build quality of the microphone. The microphone is not made of some cheap plastic but of metal. The microphone requires 2 AA battery, where as the receiver has a rechargeable battery. I have used it only a couple of times so I cannot comment on the battery life yet. The sound quality is great and I didn't hear any echo in my use. I was within 10 ft of the receiver and I didn't have any problem with the range.
Great product that I was able to use outdoors at a festival. The range is awesome and the sound is crystal clear.