K21

I have had several of these. So comfortable and battery life lasts for days.

Most comfortable, loudest most wonderful earphone I've owned. It doesn't work 24 hrs, I get 12 to 14 hours of constant use out of it. I have loved it till I got hit in the head right on the earpiece. I took it out for a few minutes to let my ear stop hurting. Put it back in my ear and it won't work at all. I took it home and charged it and the light came on red and then turned to blue but it still won't turn on. Rather cheaply made if one little hit breaks it. I've only had it 47 days and its already trash. Thats not woth it. Attemping to contact seller for a replacement or refund but I don't want something that I use everyday and depend and rely on to break so easily.

I was skeptical of how long the battery would last on this thing but i just got through a 12 hour shift no issues, i havent yet tested how long it can last but it made it through my whole day at work so I couldn't be happier about that!I was also worried my ear might get sore with the hook being somewhat thick but it was really comfortable. and you can adjust it easily to switch ears if you needed to, I never didI will say the color isn't as gold as in the picture, the round design on the side of the hook is the same but the circle on the earbud and the ring around the top of the hook are lighter, you cant tell in low lighting but if it's decently bright it does look a bit off since they don't match, but either way it's still a very nice looking headset, no ugly logos or anything, and the gold makes it easy to find as well so im happy with the look of it.

After buying 3 ..lost one. im impressed...this is in the top 5 purchases of all time ..and I've bought alot ..this will go over 24 hrs that in itself is amazing. I am blown away it sounds great too comfort is maybe one star less . I dont understand any negative reviews other than big ...yes it's big come on. Guys sheesh that's why it last 2 days on a single charge it's got a big battery in it !!! it works like clock work for 20 bucks buy it !!!!!! If your like me and need play time at work ..one worker to another it's a good 1 and worth every dollar.

I bought this Bluetooth headset last week. I used it all the time, especially when I drove to the office and on my way home. It is fully adjustable, suitable for binaural and perfect match with my Android smart phone. The sound quality is very good, everything sounds very clear. The microphone is very sensitive. It looks like a solid product and feels cheap or weak in structure. Surprisingly light and comfortable wearing. I use it to drive. But you know, this is also good for music. It's really cheap compared with the beat. You just put it on your neck. You don't have to worry about losing it. The quality is good and the price is reasonable

missing charger with product

Looks nice but function lacks alot. Sound isn't too bad but could be alot louder. Battery life has been stupendous for me, only have to charge about once every 4-5 days and I wear it constantly and use it up to 18 hours a day daily and 30 hours straight once a week without battery worries. My 2 biggest complaints are ;1 who ever designed it didn't take into account the charge port can make the ear sore from contact with the ear and 2 after a week it turned itself on to the Chinese voice option and speaks everything to me in Chinese and I can't change it back. Otherwise it'd be nice to have a volume control on the device itself instead of having to control volume via the device the Bluetooth is connected to

The battery life on this is amazing. I charge it every couple of days and it last me all day at work. The only thing I don’t like about this headphone is it hurts my ear. They just aren’t comfortable in my opinion.