Extremely comfortable to use, and they do not rub (at least they do not rub me). There will be 9 hours of sound, as stated. This seems like a questionable assertion, but five to six hours is the typical range I've heard. Probably has a total life of 9 hours on the battery (turned on, listened, turned off) An independent power supply, (separate) is not present; therefore, the use of a charger from the phone is implied. The set includes, in addition to the charger (which is also a Bluetooth headphone settings module) device, additional eartips and a charging cable for the box that has "(Lightning) iPhone - USB" connectors. The set does not include an autonomous power supply. The charging status of the headphones and the box is only shown once when the device is connected to the phone (I was unable to locate an option within the phone that allowed me to "highlight" the charging status at will), but the information regarding the charging status of the headphones and the box is always displayed on the clock. A red LED will illuminate on the lower half of the box whenever it is in the process of being charged. The sound is pleasant and not sharp; I enjoyed using it. In contrast to traditional wired headphones, it does not cause discomfort when the volume is turned up to its highest setting. The sound can be readily enhanced to the desired level with the help of equalizers for phones. While you are having a conversation with another person, they are able to hear you well, there are no distracting background noises, you have the choice to adjust the microphone reception independently from the left or right earphone, and you can also choose the automated microphone selection option. When you remove one of the earphones from your ear, the "in-ear" sensors that are built into the earbuds ensure that the other earphone continues to function while the one that was removed switches off. Although I did not put it through its paces in terms of water resistance (immersion in water), I did wear my headphones when it rained moderately and did not experience any issues with its performance. Included in the image: a charging case along with headphones (next to standard iPhone headphones for example), - the impression of being contained within a box, - charging of the headphones' and the box's batteries after being connected to the phone - Graphics illustrating the cost of headphones and the time spent boxing on the clock
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