A mobile conference system including a first mobile master hands-free unit and a second mobile slave hands-free unit, each having a microphone, a loudspeaker, a battery unit, an operating unit, a lighting unit, and a first transmitting/receiving unit for bidirectional wireless communication between the first and second mobile hands-free units. The first mobile hands-free unit includes a second transmitting/receiving unit for wireless bidirectional audio communication with an external unit. The first mobile hands-free unit is configured to wirelessly transmit audio signals received from the external unit via the second transmitting/receiving unit to the second mobile hands-free unit via the first transmitting/receiving unit, to mix audio signals received from the second mobile hands-free unit via the first transmitting/receiving unit with audio signals recorded via the at least one microphone of the first hands-free unit, and to wirelessly transmit said audio signals to the external unit via the second transmitting/receiving unit.