Good design, light but strong enough headphones. Pairing bluetooth posed no worries. Autonomy is good and true to what is announced (about 8 hours). The sound is well balanced. Quite powerful and enjoyable as homogeneous, no ear fatigue. Especially since the helmet because of its lightness is quite comfortable to wear.
In short this is a very good product at a budget price, but that does the job properly. If one seeks a bluetooth headset cheap but still satisfactory in performance this model from Kinivo is a good compromise!