The Galaxy Audio AS-1100D Any Spot Series Wireless Personal Monitor Band Pack System includes 4 receivers and 1 transmitter. It is designed to get the whole band wireless in 1 package. The AS-1100-4-D will allow a band to send 1 stereo mix to 4 individuals. Simply plug the Any Spot monitor into a monitor out jack on a mixing console, create the desired mix, and it's ready to deliver quality sound. The AS-1100 has 120 selectable UHF frequencies to help locate the best and clearest signal to transmit. The transmitter (AS-1100T) is selectable to either mono or stereo. Each AS-1100R receiver features a 100mW headphone amplifier with a standard 3.5mm (1/8") headphone output jack. The receiver is sure to be plenty loud for almost any environment. It also has a built-in limiter and an LCD display. The AS-1100T transmitter has 2 XLR 1/4" combo jacks for its inputs, a stereo / mono switch, a headphone output, volume control, and an LCD display. It includes a single rack mount kit for mounting 1 unit in 1 rack space. The Any Spot series Wireless Personal Monitor is an apt alternative for performers who are tired of lugging around heavy and bulky floor monitors and tired of leaving a gig with ringing ear. It is effective at eliminating stage noise and feedback, protecting users' ears from damage, and allowing the user to move around the stage or audience and continue to hear the monitor mix.