OCInside.de reviewed the Tozo Open Buds
A quote from the article:
The new Tozo Open Buds are open on the ears! In the big world of small Bluetooth headphones, Tozo's Open Buds aim to stand out with their open acoustics. In our Tozo Open Buds Earbuds test here on OCinside.de, we will see how well the implementation has succeeded in practice.Tozo Open Buds Review