A fuel cell system includes a fuel cell having a water passage and passage for gas required for power generation, a first protection device which prevents freezing of water in the fuel cell by maintaining the temperature of the fuel cell, and a second protection device which prevents freezing of water in the fuel cell by discharging the water in the fuel cell. The adjustable baffle assembly includes a first wall that is securable to the front flow control baffle in at least a first position and a second position. For this purpose, a channel is provided in the movement chain, and the transmitter is connected to a transfer element transferring a torque that is led through said channel to a section of the movement chain that is farther away from the transmitter than a transmitter-side end of the movement chain. A disruption in communication with the server may occur due to a Call Waiting signal caused by an incoming telephone call. The composition comprises a binder component; a filler component which polymerizes to form an acrylic matrix subsequent to contact with the binder component; and an antimicrobial agent available for diffusion from the acrylic matrix.