Operating in the 903.1 to 912.2 MHz frequency band, the VocoPro Digital-Quad-B3 is a four-channel UHF wireless headset and lavalier microphone system offering versatility and easy setup for up to four subjects, making it ideal for singers, actors and actresses, panel speakers, and interviewers/interviewees. It includes a Hybrid-Quad receiver, four wireless bodypack transmitters, four headset microphones, and four lavalier mics, as well as a rackmount kit, the required power adapter, and a 1/4" cable.Incorporating 24-bit digital UHF technology and dual removable antennas, the receiver is designed to deliver clear and consistent signal. It features four channels, each with adjustable volume, AF and RF indicators, and a balanced XLR output. Connect the omnidirectional condenser headset or lavalier microphones to the bodypack transmitters, which utilize individual mic IDs to eliminate crosstalk. Each transmitter is powered via two AA batteries (available separately), and provides battery indication and adjustable gain.