Easy to download songs onto headset. headset is light, comfortable and adjustable. Sound is good on MP3 mode when swimming. Charge lasts long. MP3 mode has a shuffle feature which is great. Can also be used to answer calls but I have not tried that yet.

Overall satisfied with the product, the quality of the build and usability. Durability of the product is yet to be proved.
The underwater sound quality during pool swim sessions are good as expected, it simply works.
The user's manual can improve by providing examples of what apps to use to download podcasts onto the device. It is not that difficult, but instructions could have saved me 30-60 mins.

i bought the NANK Runner Driver2 Pro off amazon. the battery life is better than i expected. the sound quality is amazing to me. i'd rather use these than my samsung ear buds. they sound great when out of the water but in the water these are awesome. my ebook comes in so clearly. it's also nice to have these on in the shower and not subject my apartment neighbors to my music or podcasts early in the morning. i don't use the ear plugs. don't feel the need for them. this product is very comfortable. the way they are charged is weird but understandable considering the waterproofing.
i ended up buying a second one for home and outdoors. my family told me i came in very clearly when i called them while using these.

Excelente para nadar. A veces los audios mp3 se entrecortan

great headphones, took them for swimming in the pool and very satisfied