Sanyo M4100LU Stereo Radio Cassette Recorder, 4-Band Portable Boombox Sanyo Electric Co., Ltd., Japan Circa 1970s Portable stereo radio cassette recorder with integrated dual speakers and multi-band reception (FM, MW, LW, SW). Designed for both home and mobile use, featuring analog tuning scale, cassette playback/recording function, and external input/output ports. Fully functional. Visible signs of age and use including surface wear, scratches, and minor discoloration. The unit will be delivered exactly as shown; close inspection of the provided images is recommended. Operational video is available via the following link: https://youtube.com/shorts/lomxRDIKse8?is=GAxdhdsjJgbN1fFK Model M4100LU represents a typical late-1970s transition toward compact, multi-functional audio devices, combining radio and cassette technology in a portable format. Increasing collector interest in early boombox designs supports its value.