Whether it's your daily commute or an intense workout, you need a perfect companion for your music. Look no further than the Woozik M900 . Crafted carefully for a comfortable and secure fit, enjoy music and hands-free calling for up to 5 hours with these headphones. [DURABLE & PORTABLE]- Upgraded built-in lithium batteries support up to 5 hours talk / music time (depending on volume and audio content) for extended enjoyment, and it only takes 1-2 hours to get a full charge.With an ultra light design at only 0.4 ounces, the M900's are your go to buds.[BUILT-IN MAGNETS] - Both earpieces are equipped with built-in magnets which can attach to each other like a necklace around your neck when not in use. This refined design helps keep these buds straight and untangled. Perfect for any daily and outdoor activities, such as hiking, cycling, sports, exercise, and more.[INCOMPARABLE SOUND QUALITY] - With new driver technology that enhances sounds by 30%, enjoy crystal clear audio, whether it's on a phone call or while listening to your favorite tunes.With an in-line microphone and volume control built-in, have complete freedom.[SECURE & COMFORTABLE FIT] - Woozik earphones are ergonomically designed with an diagonal angle to fit your ear canal better and reduce noise. In addition, with 3 pairs of ultra soft ear tips (S/M/L) , these earphones ensure a comfortable and secure fit.