STEREO SOUND & DEEP BASS：These true wireless earbuds present rich sound and good bass. When listening to songs, you can enjoy the full beauty of the music. Both earbuds, left and right, have built-in microphones, so when making calls the recipients will hear you in true natural stereo. This will provide a listening experience beyond most of the Bluetooth earbuds you have used in the past.

COMFORTABLE & SECURE FIT: These TWS Sport headphones are designed for perfect ergonomic fit, both ear buds fit your ear canal with a most comfortable angle, Large /Medium /Small ear hooks ensure secure fit on your ear, these workout earphones will not drop out even you are running /jogging /cycling in gym or hiking outdoor.

SMART PAIRING & TOUCH CONTROL: When you use these wireless ear buds at first time, just pick up both ear buds out of the charging case. Open Bluetooth on your phone and select"MB-259R". Then by touching or tapping on the top case, you can control multi-functions such as: Power On /Off, Play /Pause or other commands (refer to manual book).

PORTABLE CHARGING CASE: These Bluetooth earphones contains magnetic charging case that make TWS earphones easy to carry & charge. The fully charged charging case can recharge both wireless earbuds for 3 times, recharge single earbuds for 6 times. You can charge the carrying case with Micro-USB port

LONG PLAYTIME: Advanced Bluetooth 5.0 chipset ensure MUCRO workout headphones feature low power consumption, these in-ear headphones supports 4 hours music time at medium volume after fully charged, 12 hours dual earbuds playtime with backup charging case, and up to 24 hours when user use the Bluetooth ear buds one at a time