Fivi AE607 TWS Earbud: My First Attempt Was Definitely Not a Flop

Hello everyone! Today I’m sharing my experience with my very first TWS earbud. Yes, just one earbud—and it’s made a positive impression on me during use.

Link to buy the FIVI AE 607 from China:
Go to store

Specifications:
Headphone type: TWS
Connection: Bluetooth 4.2
Intended for: Smartphones and players (with Bluetooth support)
Driver: Dynamic
Frequency range: 8–25,000 Hz
Microphone: Yes
Controls: Mechanical button for answering calls and redialing the last number
Impedance: 9 Ω
Weight: 4 (earbud), 26 (case)
Capacity: 380 mAh

Package contents
The packaging is simple: plain cardboard and a sticker listing the main specifications. Interestingly, the frequency range isn’t listed (I got it from AliExpress), but it does show the model, the case battery capacity, and the battery life of both the earbud (rated at 4 hours, but it pleasantly surprised me) and the case before it runs out completely (20 hours).

Along with the earbud and case, you get a user manual in English only (surprisingly), a short white USB-to-micro-USB cable, and 2 extra pairs of ear tips in different sizes.

As for the ear tips: my ears start to feel uncomfortable after 3 hours of use, which is good news for me because I’m “intolerant” of silicone tips. These are also SIGNIFICANTLY more comfortable, and my ears get less tired with them than with the similar tips on the Razer Hammerhead, which made my ears start to hurt after just 30 minutes of use.


Appearance
The case is very compact and made entirely of plastic. The photo shows it next to a Ukrainian 5-kopeck coin. The outside is fully glossy. The glossy finish picks up fingerprints easily, but they wipe off quickly with a cloth. It has 2 LEDs: the left one indicates the earbud, and the right one the case. They can light up independently (red means the case/earbud is charging; blue means charging is complete—in the photo, the earbud is charging and the case is charged). The build quality is good, with no play anywhere. The hinge moves smoothly, and the lid opens with some force (it uses a latch). Once you get the hang of it, you can easily open it with one hand. The charging port (micro-USB) is on the back.



The inside is made of matte plastic. There’s a strong magnet that holds the earbud securely (it definitely won’t fall out, even if you shake the case hard with the lid open), as well as a slot for the earbud with charging contacts.


The earbud is very small and made of plastic, with a glossy finish everywhere except for the matte mechanical button. The button turns it on and off, connects it to a device, answers calls when pressed, and pauses or plays music depending on the situation. Double-pressing it redials the last number. There’s an LED that flashes red and blue. The button has a very satisfying mechanical click and only presses in its lower section. While using it, I tried foam ear tips, which look a little odd.





Connection and microphone
It connects to the phone very quickly, and the connection is good. I didn’t experience any dropouts or interruptions while using it. It has no trouble getting through a thick wall, and its range is better than that of the KZ BTE and QCY Q20. The microphone is good; I had no trouble being heard at home or outdoors, though the subway is another story. People I spoke to didn’t complain about the sound quality, and I could hear them clearly too. It’s quite pleasant to use as a headset.

Ergonomics
The earbud fits my ear incredibly well. I ran and did exercises, and it stayed securely in place without falling out once. With the standard ear tips, discomfort sets in after 3 hours of use; with the foam tips, I had no discomfort on a single charge.


Battery life
FIVI gave me a very pleasant surprise: with my usage, I got just over 5 and a half hours on a single charge. That was with mixed use and no disconnection from my smartphone. I sometimes paused playback, answered calls, and varied the volume from 30 to 100%, but mostly kept it at 75%. I’m incredibly happy with the battery life—I didn’t expect such a tiny thing to play for so long. My other Bluetooth headphones with a cable lasted no more than 8 hours, and this little earbud has impressive battery life. The case takes about 50–60 minutes to charge, and the earbud just under 2 hours. Total playback time is rated at 20 hours.

Sound
This is a very debatable point, considering it’s just one earbud. I used them with a Redmi Note 5 Pro smartphone and the SBC codec. Without apt-X, the highs suffer, but overall they sound good: the bass is noticeable and quite good—tight and powerful, especially with foam eartips. The mids are good too: reasonably detailed and not recessed. The highs aren't harsh, though they are a little lacking. For Bluetooth headphones, they're very good indeed; they sound better than the QCY Q20, which many people praise. I vaguely remember the I7s I borrowed from a friend, and the FIVI sound much better. By the way, there's no “barrel” effect. Bottom line: the sound is good, considering the price and form factor of these headphones.

Conclusion
FIVI's first attempt didn't turn out to be a flop, and I like these headphones. I'll use them for workouts or when I need to answer calls (the microphone is good) while my hands are busy, such as when driving. They're also a good choice for students like me, including during exams. Since there's no track control, they'll work great paired with a Mi Band 4. I really like the battery life and the sound overall. Would I recommend buying them? Yes. They're definitely not for audiophiles, but they're more than good enough for audiobooks. This review is quite subjective, since I was the only one who used them and based it entirely on my own experience. If you spot any issues or mistakes, please point them out in the comments. Thanks for reading!
Link to buy the FIVI AE 607 from China:
Go to store