Any spot wireless personal monitor is a great entry-level wireless personal monitor. This system features an 80mW receiver output. The receiver also contains an RF and low battery indicator. The transmitter has L/R level display, stereo XLR/1/4-inch inputs and a headphone output with volume control. The AS-900 is a single channel, fixed frequency unit. The 900 band pack systems make it easy for any band to get personal. The system includes four receivers and one transmitter. It is designed to get the whole band wireless in one package. The AS-900-4 will allow a band to send one stereo mix to 4 individuals (additional receivers may be purchased). It is a great alternative for performers who are tired of lugging around heavy and bulky floor monitors and tired of leaving a gig with ringing ear. The any spot allows the user to move freely around the stage or audience and continue to hear the monitor mix.