Lightweight and comfortable bone conduction headphones, the V16 model with Bluetooth 5.3. - Brand: EQZ - Model Name: V16 - Color: Black - Bluetooth Version: 5.3 - Features: Bone conduction technology - Weight: Lightweight Thank you for viewing. I charged and tested the connection after purchase. They work and I can hear the sound. I bought these to use at the gym, but I ended up using a different pair, so I'm selling these. The corner of the box is slightly torn, but the contents are not affected. The purchase price was about 3000 yen.