I received this device at no charge from a relative's estate sale, so in good conscience, I cannot sell it. It is available to you at no charge. I only ask you to pay for shipping from Ashland City, Tennessee. The 465M is a 100 MHz analog oscilloscope from Tektronix. Measure voltage or current signals over time in an electronic circuit or component to display amplitude, frequency and rise times, etc. Applications include troubleshooting, production test, and design.