Any spot wireless personal monitor band pack system is designed with features for the professional. The system includes four receivers and one transmitter. It is designed to get the whole band wireless in one package. The AS-1800-4 will allow a band to send one stereo mix to 4 individuals. The body pack receiver is set up for a king. With 150mW of output to the ear buds, the AS-1800R is sure to be plenty loud for any environment. The receiver has a squelch adjustment, stereo/mono switch, LCD display, button lock and a magnesium alloy construction. The mixed mono feature allows performers to adjust the balance of the left and right audio signals sent from the transmitter right on the body pack.