Device features: 32 or 42 channel EEG amplifier, PC with HDD min. 500 GB, DVD recorder for EEG data archiving, LCD monitor min 21, Laser printer used for printing of the polysomnographic registration (it is possible to print the whole examination or fragments), examination results and histograms, Uninterruptible Power Supplier that provides emergency power in case of the failure in the power supply, Unlimited montages of electrodes EEG DigiTrack software for recording, viewing and analysis of the EEG signal. It enables smooth viewing and the change of the scale of the EEG recordings and histograms. There are many other functions, for example the spectral analysis of any fragment of the EEG (FFT). Patient Database software for patient registration, examination management and creating statistics, Accessories: trolley with surge protector, set of cable, stands, stimulator holders and head holders, EEG cap, set of electrodes, conductive paste EEG (8), EKG (1), EOG (2), EMG (2), Respiratory bands for recording thoracic and abdominal movement