Check the listing for details. HP 3560A Handheld FFT Vibration Acoustic Spectrum Dynamic Analyzer ~DC - 40kHz. Condition: Used. Listed at 1194.00 USD. In good condition, both channels appear to display frequency and time domain correctly. I have not verified calibration, but nothing seems out of ordinary. Battery is not included, but labels from original battery included along with its power connector. AC adapter is included, and analyzer is fully functional running off adapter, however the backlight will only operate when a battery is included (I connected a 6 VDC power supply to the battery input to take the image demonstrating the working backlight). Upon startup the screen says "demo", but all features appear to be fully functional without limitation. I was also able to connect the serial port to a HP LaserJet 4m printer, and print plots directly from the analyzer to the printer without using a computer.