I am writing this review after using it for 1 week.1) Battery Backup: For battery backup I would say it is the best earphone in its class. I charged it only once on the day of received and didn't charge. I am using it more than 1 week continuesoly, 5-6 hours daily in music and phone conversation and it has still 60% battery. I would highly recommend it for long lasting battery backup.2) Charging Time: It took 1 hour to get complete charge and as per my usage experience, it seems true that if you charge it for 10 monutes it would give 10 hours battery backup. It has type C charging port and type C cable in the box.3) Call clarity: It is giving optimum performance while talking. It supress almost 70-80% background noice while you talking means the other person can hear your voice very clearly and you can hear him/her very clear.4) Cotrols and Mic position: It has 3 control buttons. Its Mic is built in within the the wire in cotrol panel which makes it more near to your mouth. Which grasp very clear voice while talking.5) Comfort: It is very light weight and very comfortable to wear within ears and around your neck. You can easily wear it while running or in work out or commuting.6) Water resistant: It has IPX7 certificate which means you do not need to worry about water splash or sweat.7) Sound quality: It has 10 mm sound driver. It is modified to give optimum bass quality for music. I am loving while listening songs or waching movies. Superb sound and bass quality.Conclusion: But it and stay tension free. You will love this product.