1.Classic retro models, very few in stock 2.The headset does not contain a microphone, can only listen to songs, 3.5 round plug design 3.The headset is a simple bag without the original packaging 4.The earphone sound is the old sound of the year, warmer, and the quality is at the same level as Panasonic's HT60.HT65, you can buy it back and compare it. The sound is very similar to that of the Aihua M38, provided that a sponge of the same thickness is used. We will add a pair of sponges to this model!