The Soundnetic SN305M earbud offers a comfortable fit with an in-line microphone and a single 3.5mm TRRS plug. The TRRS plug makes it compatible with most tablets, smartphones, laptops, and PC's. The rubber-tip SN305M's are individually packaged in a resealable bag for hygiene and convenience. Great for use as wholesale earphones/earbuds with school or work, and more compact than a headset with microphone.