NeuroPhase designs and manufactures advanced biomedical sensing and instrumentation systems under the brand Brownlee Precision. Researchers in neurophysiology find our products rich in features, highly reliable, and easy to use. Our flagship instrumentation amplifiers feature: high impedance inputs, single-ended or differential inputs, gain range up to 10,000x, low noise circuitry, tunable 8-pole Bessel lowpass filter, adjustable highpass filter, and output offset controls. These rack-mountable amplifiers contain 4 independent channels with convenient front panel controls and bright LED readouts. please visit www.neurophase.com