mifo wireless earbuds,bluetooth 5.0,mifo o2, wireless headset with charging box,ipx5 waterproof,stereo headset,half ear into the built-in, advanced sound with deep bass movement (black)For O2 true wireless eabuds, we designed the open-close structure to the interior of charging case to keep perfect smooth radian. This design reaching a wonderful grip feel. Besides, the compact size let O2 wireless earbuds easy to carry, it's small enough to fit in a pocket easily. We also using seventeen different stamping process to make the radian metal charging case. The charging case is space gray will able to match many other devices. The mini wireless earbud will give you 7 hours of playtime on one charging with an additional 100 hours playtime from charging case. The charging case has 2600mAH battery can charge 15 times for earbuds. Longer battery life let you have no worry about a recharge. We did thousands of ear shape data collection and wearing test. 698 times optimize, and finally become what O2 is now. O2 bluetooth earbuds have an unmatched combination of comfort and stability. Accurate to 0.05mm radian adjustment let you still feel comfortable when used for a long time. O2 wireless earbuds is waterproofed to IPX5 standards that can use in any sports activities. O2 let you enjoy music anytime anywhere. Take out O2 wireless bluetooth earbuds and they're ready to use with all your devices. The latest bluetooth 5.0 technology ensures stable connection and lossless transmission of music. What's in the box? O2 wireless earbuds, a charging case, a guideline, an user manual, a charging cable, a brand manual. SPECIFICATION Wireless type: Bluetooth Bluetooth version: Dual-mode V5.0 version Charging case capacity: 2600mAH Earbuds battery capacity: 60mAH Working range: 20m(65ft) Standby time: 90 days>