Very early cardioscope by Sandborne -- the first maker of portable cardioscopes that allowed to get a print out of a heart rates waveform--very cool and museum worthy. A similar machine is in the Harvard Collection of Historical and Scientific Instruments. Great for early tech collections . Comes with sensors and original rubber straps--very old but still intact. Comes in portable carrying case. Have not fired it up and may need a power cord, but looks to be in very good condition.