I was cleaning out my grandmother's house and found a box for headphones. I tested them and was able to listen to music without any problems. When I touched the replacement sponge in the middle, it crumbled due to aging. There are no problems with the main unit. This is a product from over 40 years ago, so please understand that there is a possibility of malfunction at any time. It comes with the original box. I think it's quite rare, so how about adding it to your collection? For vintage Sony fans, those who want to experience the original sound of the time, this is a condition you won't find again if you miss this opportunity. 【Product Details】 MDR-30Ⅱ ■Original Price: 4,200 yen ■Type: Dynamic Open Air Type ■Diaphragm: ■Impedance: 25Ω ■Frequency Response: 18-20,000Hz ■Maximum Input: 100mW ■Sensitivity: 100dB/mW ■Cord: 2m Stereo 2-way plug ■Weight: 39g (excluding cord) ■Release Date: November 1983 ■Discontinued: 1985 ■Remarks: Available in silver and black finishes #Walkman #Stereo #Audio #Record #ShowaEraItem #WithBox #Retro #CollectorItem #MDR #WALKMAN #VintageAudio #Headphones #Sony #SONY