The Atlantis will go from 0.0 to 120 Hz. It provides several ways to train frequencies.
The standard EEG mode is useful from 0.5 to 60 Hz.
With the 3.2.2 software, you can get standard EEG signals for standard training protocols with a bandwidth of 0.01 to 120 Hz.
In addition, it has a true DC channel that provides the DC offset down to zero Hz. via. the Event Wizard. So you could acquire, for example, a signal with a bandwidth of 0.0 to 1.0 Hz.
The 3.2.2 system can also do slow cortical potentials with a bandwidth of anything from 0.0 Hz on up as the low end. For example, you could do SCP with a bandwidth of 0.01 - 2.0 Hz or even 0.001 to 2.0 Hz, etc.