Hewlett Packard 8566B 100 Hz – 22 Ghz Spectrum Analyzer. Unit power on. Fans quiet. Display is dim (typical) but in focus, no visual image burns and still useable. Oven indication extinguishes after about 3 minutes at room temperature. Rotary encoder and buttons function O.K. Desk feet and pull-out charts from bottom compartment present. 2 rear bumpers from top unit (display) missing. Unit shown with calibration signal displayed. This unit will be separated and ship in 2 boxes.