The Galaxy AS-900 in-ear minitor is a great entry-level wireless in-ear monitor. End the clutter of monitor speakers at your feet. Hear your monitor mix directly in your ear and block out extraneous noise. This system features an 80mW receiver output and has an RF and low battery indicator. The transmitter has L/R level display, stereo XLR and quarter-inch inputs, and a headphone output with volume control. The Galaxy AS-900 is a single channel, fixed frequency unit.