Top critical review
3.0 out of 5 starsHeavy user's caveat: 2 warranty claims; unstable with iOS 13+, battery pack dead in 3-6 months
Reviewed in the United States on December 12, 2019
Update 7/28/20: I use these approximately 8 hrs per day, between two pair, to provide telehealth. I'd give 4 stars if I hadn't had to file two warranty claims within 6 months.
BATTERY LIFE: The buds last at most 4 hrs per charge.
SOUND QUALITY: The sound quality is great for EDM, a little heavy on the lows for conversation--my hearing accommodated it after a few weeks.
BLUETOOTH CONNECTIVITY: The firs buds were replaced under warranty after update from iOS 12.6 to 13.1 due to instability. Unfortunately, the second pair was only half as inconsistent, but for the price, I wasn't too surprised. They seem more stable with iOS 13.5+, but still drop signal. Fortunately, they reconnect pretty quickly.
BATTERY PACK: I've used both pairs each day, M-Th, for the previous three months (since COVID started in US). Both battery packs died within days of one another (one battery pack lasted 6 months the other 3 months). I contacted Support for a warranty repair. They agreed to send a replacement battery pack (which will make for some interesting swapping, but a small price to pay).
STYLE: I really like the low profile.
FIT: I've tried a few other brands, these fit the most comfortable--my ears are picky, one side is slightly larger than the other.
FUTURE PURCHASE: If I were shopping for a new pair, I'd definitely consider the bluetooth 5.0 version with the battery pack that indicates charge level; or for a voice to come on to say the charge level after the buds are connected to my phone. If I were a standard user who only used these for occasional use for walks and casual use, then these would probably have lasted a lot longer.
WARRANTY: The ease of a warranty claim is a huge plus, though I would rather have a pair that lasted the full warranty.
PAST UPDATES:
Update: 7/16/20. The battery life is unfortunate. After using two pair for the past three months (at approx. 4 hours of use they need recharge) Monday thru Thursday both units battery packs are dead. Luckily one still flashes a single white LED, the other is at best a storage case. I was fortunate enough to obtain a second pair through warranty after the first randomly lost connection with my iPhone X after update to iOS 13.1. Sadly, the second pair had issues as well. Though, with 13.5+ it seems to be much better--less intermittent, but still drops a few times during each charge.
Update 6/25/20. After a few months of operation and tolerating the intermittent "link loss" I learned that the batteries last about 5 hours after charging all night long. They are a bit bass heavy, which can make calls a little challenging sometimes. But, for the price they are reasonable.
Update 4/27/20. I received the replacement buds on 4/24/20; the rep said it would take 2-3 weeks, but significantly less, and during the COVID crisis. I have worn them enough to drain the battery pack and have not had a single occurrence of a dropped signal (I really like that I can wander through my house without the sound cracking--my Bose can't even do that). I'd rate these at 4 stars, only leaving it at 3 for others who are prudent.
Update: 4/14/20. I received word from TOZO that they will send a new pair of earbuds because, as odd as it may sound, I do not know anyone with an Android (thus unable to update the T6 to work with iOS 13+). The email stated that the buds will arrive in 2-3 weeks, which will be wonderful, but seemingly after writing an honest review (which I had done before contacting them and after initial purchase, below). I have not check to see if they made the manual available on the Support page of their website, an issue noted on 4/9/20. Once the new pair arrive, I'd give the review 4 stars, if the next generation of T6 or others are updated through the case and the power versus volume were improved (tends toward volume, not power), and the customer service is 3-4 stars (replacement shouldn't be based upon review, that is unethical in professional fields); in responsiveness and understanding, I'd give a 5, but would need to give a reduction for the website lacking information and review requirement. The product itself is a good 4.5-5 depending on whether you like heavier bass or not. The cost for what you get, all aside, still makes these a good investment.
Update 4/9/20. These guys literally posted on their website that they have proven an issue with iOS 13+ and to fix it you need an Android to flash the buds; are you for effing real? Apparently they failed to engineer a device that can be updated while in the case and plugged into a computer or via usb to a phone or tablet. (So, if Android updates, guess what you're going to need!) I feel sorry for all those who tried to problem solve the issue since the only means to contact Support is via email. (That means a day or two lag minimum for each email exchange.) The known problem is that the headset intermittently drops signal, sometimes to recover, other times not.
Also, when they updated their website with the information to fix the issue with iOS, they somehow seemed to either take down or didn't have the user manual posted, and none of the product pictures capture all of the tap sequences to control the buds. So, if you can't find the user manual that came with it, you're totally SOL.
The greatest challenge I have is turning them off. The buds tend to become confused between turning them off or increasing or decreasing volume. It's almost better to either turn off bluetooth on my phone or put them in the case.
Original post, Dec 2019: A bit heavy on lower frequencies, the crossover a little too much. It's taken a little bit of time to get used to the difference between the voices known in life and on the phone versus earbuds. They are a great pair to have for those who like more bass--great for EDM! Overall, great bang for the buck since this is an EDM household.