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Very useful flashlight. You can use the good camera of your mobile phone to take wide shots because most built-in wide cameras in mobile phones are of low quality! The macro is also very good

Εξαιρετική ποιότητα. Μας βόλεψε παρα πολύ. Στιβαρή κατασκευή και μεγάλη ασφάλεια με το σύστημα IOFIX

Excellent product and very good quality. It automatically connects wirelessly to the computer with the adapter it has. It has an ON/OFF switch and an optical battery level indicator. Very good laser pointer and works with 2 simple AAA batteries. It includes a practical carrying case. It also has a button that darkens/hides the screen from the audience (very useful for those who make presentations) as well as a play button!

So I bought these headphones just yesterday. So far they seem really good for their price. Excellent build quality, not cheaply made, and easy connection with my phone. It took me a while to figure out how to connect them to my laptop, but I managed it. If the sound quality is bad when connected to a computer, turn off the setting for call audio. Once you do that, the sound becomes excellent. I haven't charged them at all and I've been wearing them for about 6 hours. Based on reviews, it seems like the battery lasts a long time and so far that seems to be the case. The bass is really strong and you might want to use an equalizer from the browser's web store to make the sound more treble-heavy!

Update 23/3: I still haven't charged them and I use them for 2-3 hours a day.

Update 29/3: I still haven't charged them and I use them for about 2 hours a day.

Update 1/5: So with an average use of 3+ hours a day since March, I've only charged them twice!!!

Very bulky and heavy and definitely not 20,000 mAh. Its performance drops quickly and now, after 2 years, it charges a 2600mAh phone 1.5 times.
The USB cable it comes with is not only short but also the only one that connects the device to the socket (you can't charge it with your own USB cable because it doesn't fit into the strange slot it has). Also, the one I have doesn't clearly indicate which port is 1A and which is 2A. It also has a flashlight-like light, but it doesn't have a button to activate it!!!!