The product is a lot of two Sony micro cassette recorders, the M-529V and M-447 models, designed for handheld use. These recorders are specifically for parts or repair purposes. They use cassette and microcassette recording media for dictation and voice recording in a business or office setting. The presence of Voice Operated Recording (VOR) technology in the M-529V model indicates the ability to automatically start and stop recording based on sound levels.