Sennheiser Consumer Audio Sport True Wireless Earbuds – Bluetooth in-Ear Headphones, Music and Calls with Adaptable Acoustics, Noise Isolation, Touch Controls, IP54 27-Hour Battery, Black

Exactly what I wanted
These are exactly what I wanted – a high quality ear bud set that will be my main workout pair (including running or mountain biking, so they need to be extra secure), but that I could also use in place of my “casual listening” pair in a pinch if the sound was good enough. I feel like a lot of these reviews don’t understand the basics of using ear hooks, or the necessity of using the app to flip between the two sound modes depending on the open ear tips or closed ear tips.
If you’re going to use the open ear tips (which have a couple tiny holes to let in some outside sound – not much, but enough that you can have a conversation without removing them), the Sennheiser app adjusts the base profile to make everything sound great. Same with using the closed tips. I tried using the “wrong” settings on purpose to see the difference and wow, it changes the sound signature quite a bit to account for the open/closed earspace. And they nailed it in keeping it sounding consistent depending on which ears tips you’re using.
PS – You also need to do the firmware update in the app. Some nitpicks have long been addressed, it seems.
Anyhow, I FINALLY found my workout pair. It’s been years of searching. Definitely better sound than my Beats Fit Pro (very solid performer and almost perfect, but not great enough to justify the extra $100) or Earfun air pro 2s (which sounded awesome and are a great value, but I had to put an aftermarket silicone ear wing attachment on them every time i used them to keep them in, but which wouldnt fit back in the charging case if the tip was still attached). These Sennheisers sound better than those two. These sound comparable to the Jabra Elite 85T and might actually have more crisp bass response. Loving the very robust battery life for a TW style earbud. No issues at all so far.

Very good when it works. Rest of the time it’s garbage.
I have only used the earbuds about a dozen or so times. Mostly for jogging which is 15-20 minutes. A couple of times for bicycling around for a few hours.
THE GOOD
They have an IP rating for water resistance. Great for working out and resisting a few rain drops. The sound quality is pretty good, especially the bass. They are comfortable in the ear for a somewhat extended period of time, but not all day. Eventually my ear gets tired and hurts from them. So under 2 hours of use is ideal. Your mileage may vary.
THE MEDIOCRE
These are not extremely loud when using outside in a busy street, such as walking, jogging, bicycling, or any outdoor activity with heavy vehicle traffic around. I’m sure they are perfect for hiking, skiing/snowboarding, mountain biking, or the like, where there is some quiet.
THE BAD
After a few uses, the left earbud has begun lowering the volume by itself after a few minutes of use, becoming inaudible, making only the right earbud produce proper sound level based on the volume level of the connected device. I can barely hear the left earbud. I have to go through the ritual of disabling all Bluetooth devices, manually restoring the earbuds to factory settings, re-paring them with each other, using the Sennheiser app to also perform a factory reset, putting them into the charging case to turn off, take them out of the charging case, reconnect them to device, sacrificing various animals and praying to some undead god beyond the cosmos, just get both earbuds working properly. And it only lasts for a few minutes, maybe 10-15, before it does it again. This is garbage.
MY RECOMMENDATION
If you have some money that wants to be liberated from your possession, buy these earbuds, use them a few times, and cherish each of those times it works. Then subsequently smash them with a hammer, because they will be more useful as broken pieces of plastic and electronic innards, then keeping it around, frustrating you to no end as to why the damn earbuds don’t work properly.

Me encantaron estos audifonos por todo! el sonido muy claro, el volumen excelente recordemos que hay que cuidar los decibeles para no afectar los oidos y ellos los tienen al nivel oficial standar, mas decibeles de volumen afectan a largo plazo el oido, lo cual ellos cuidan perfectamente, bravo por Sennheiser! ! LLegaron a tiempo con un pequeno golpe en la caja pero por dentro sin afectar las piezas. Quiero mencionar que estaba dudando un poco al comprarlos por los comentarios de que lastimaban el oido pero la verdad para mi no me causan ningun problema ni dolor al tenerlos puestos hasta 4 horas seguidas, y yo creo puedo tenerlos hasta mas tiempo sin problema, aparte vienen con diferentes adaptadores para el oido y eso es un plus, excelente equipo y super precio!

Einfach eine Frechheit, Artikel ist unvollständig und so nicht zu verwenden.

Falls off when running.