Description:Easy III enables the recording of crystal-clear signals with a 4 kHz sampling rate and bedside impedance checks. For those looking to get the most from their PSG amplifier, the Grael 4K offers high-definition PSG/EEG with up to 60 channels. Light-up touch-proof connectors for bedside impedance checking and lanyard for carrying when disconnected. Embla NDx-102 channels, SDx-58; both with derived channels, nasal pressure, & built-in oximeter. Touchscreen base allows bedside impedance and biocals.