VocoPro SilentSymphony-Seminar, RCA, (SILENTSYMPHSEMIN)Transmitter and Receiver Headset sold Separately Operates in the 900MHz, clear of TV Station Interference Broadcast Audio to an Unlimited Number of Wireless Headphone SetsUse up to 3 Transmitters Simultaneously Internal Battery Built Into Transmitter for Remote Use Transmission Power Level Toggle (High/Low)Available Stereo RCA Audio Input on transmitter Available Stereo 1/8” Audio Output on Each Wireless Headphone Set Headphones have an 18Hr Battery Life Off Two AAA BatteriesIncluded 1 trasmitter 50 headsets
