This receiver does come with the owner's manual and seems to work just great. Although the volume knob could use a little cleaning which is a very easy fix.

The Harman/Kardon HK 490i Digital Synthesized Stereo Receiver is a sleek silver stereo receiver manufactured between 1980-1989 in Japan. This receiver supports FM and AM modes, with a power output of 30 watts into 8 ohms. It features audio outputs including headphone jack, stereo L/R RCA, and banana speaker jacks, as well as audio inputs like AUX, phono/turntable, and stereo L/R RCA. With 4 outputs and 8 inputs, this receiver offers a variety of connectivity options for your home audio system. The Harman Kardon brand ensures high-quality sound and performance in a compact design.