The band A & C WMS40 Mini Dual Vocal Set Wireless Microphone System from AKG is a true plug and play wireless solution that provides clear audio sound. It can be used to capture audio in several environments for applications such as live stage, rehearsals, conferences, and more. In addition, it has an extremely long battery life of 30 hours on a single AA battery, and saves money in day-to-day operation.Each of the two included HT40 handheld transmitters features a dynamic cardioid capsule for maximum gain before feedback. The WMS40 is a fixed-frequency system and the SR40 receiver has two 1/4" output connectors. A universal power supply is also included.