Feature:1. Oraimo Roll delivers rich and full sound with high-performance 13mm drivers. Specially tuned EQ by oraimo acoustic experts brings heart-beating music.2. Both earphones are equipped with omni-directional MEMS microphones that effectively reduce backgrounds noise, making your voice heard clearly.3. By using an intra-concha design, the earphones do not block the ear canals, providing weight-invisible comfort.4. Roll has gone through rigorous life cycle tests to ensure long-term performance. Advanced sensors and protective circuitry are added to provide safety measures.Specification:Features:Oraimo Roll delivers rich and full sound with high-performance 13mm drivers. Specially tuned EQ by oraimo acoustic experts brings heart-beating music.Both earphones are equipped with omni-directional MEMS microphones that effectively reduce backgrounds noise, making your voice heard clearly.By using an intra-concha design, the earphones do not block the ear canals, providing weight-invisible comfort.Roll has gone through rigorous life cycle tests to ensure long-term performance. Advanced sensors and protective circuitry are added to provide safety measures.Roll is designed to shrug off water and sweat with IPX4 conservation, leting your music never stop during your outdoor adventure. What you only need to do is gently wipe both earbuds after every workout.4-hour playtime on a single charge, and the tiny charging case provides extra 12-hour playtime.Specifications:BT Version: V5.0Range: 10mBattery Playtime: 4 hrs on single charge; case provides additional 12 hrsCharge Input: Type-CPacking List:1 *EarbudsPackage List:1 *Earbuds