The surface of the earphones is covered with sponge. Does not hurt the ears, soft and comfortable. Generally suitable for a variety of purposes, including music listening, phone calls, watching videos, playing games, etc. The oblique ear-hanging wearing structure, with the ear shell on the outside of the ear canal, protects the delicate ear canal and is painless when worn for a long time. 4.9 ft / 150 cm long, making the headphones more portable and suitable for being placed in pockets, bags or other small spaces for easy carrying. Compatible with most 3.5mm audio cable jack smartphones, including the full range of iPhones, Samsung Galaxy and Note Series, Game consoles, MP3 MP4 music players, tablets and speakers, etc, Ambient Sounds.