VocoPro A- B Box, 8.00 x 4.00 x 12.00 (SilentSymphony-Headphone)Operates in the 900MHz, clear of TV Station Interference Broadcast Audio to an Unlimited Number of Wireless Headphone Sets Use up to 3 Transmitters SimultaneouslyInternal Battery Built Into Transmitter for Remote Use Transmission Power Level Toggle (High/Low)Available Stereo RCA Audio Input on transmitterAvailable Stereo 1/8” Audio Output on Each Wireless Headphone Set Headphones have an 18Hr Battery Life Off Two AAA Batteriesitem package weight: 0.771 kilograms
