The Sennheiser SKM9000 Dual bundles great sound and ease of use into a sleek handheld wireless system. The two included transmitters employ 835 cardioid capsules with a warm, smooth sound, excellent feedback rejection, and superior SPL handling. Convenient features like one-button scanning and synchronization are housed in a streamlined receiver with built-in antennas. Intuitive icon-based indicators make operation a piece of cake. Use up to 10 systems simultaneously. The Sennheiser SKM9000 Dual is a great handheld wireless system forsingers, presenters, instrumentalists, Churches ,DJs and school.