The Performer C3 is an ergonomically shaped, fully digital 2- channel beltpack that includes all the standard features from conventional analog partyline systems including daisy-chaining. The beltpack uses high-quality digital audio for noise-free and hum-free signals. Extensive DSP signal processing provides perfect sidetone-nulling and excellent intelligibility in applications with very high ambient noise levels. The C3 has three XLR connectors, one for headset, one for signal input and one for signal loop through, which can also be used as an additional analog program input.