... or wireless Bluetooth transmission 24bit precision; Expandable parameters: ECG,RESP,SPO2,SEMG,EOG Types & Features Product DescriptionType D EEG/ERP/PSG ... % on batteries;6) Additional 12 Channel PSG:EOG,EMG,ECG, Spo2, air flow, thoracic and abdominal respiration, Snore;7) Acoustic&Visual ...