Rich colors12 colors mixed,Very colorful,each headphones is individually packaged,The sufficient quantity and rich and diversified colors can suffice your needs for daily use or replacement,and you can also share them with your surrounding people Clear stereo soundclassroom headphones featuring stereo provide you with complete and clear audio,suitable for students to listen to music or have a test,ideal for many sorts of occasions,like classrooms,airplanes,libraries,galleries,museums and more Strong compatibilityour headphones in bulk are equipped with a long cable of about 48 inches with an auxiliary jack of about 3.5 mm/ 0.11 inches in diameter,having a strong compatibility with your cell phones,laptops,tablets,computers and music players Quality material & Adjustable student headphones have an adjustable headband that fits adults and children well,ABS plastic material makes the headphones lightweight and portable,reliable and long lasting,strong enough