Purchased in April 2014 at a derisory price, it still works great! The sound is very correct (I changed the helmet for sports helmet). Autonomy is good (at least 3H even after 1 year of use) and is not afraid of rain. It is basic at the interface but this is quite sufficient. It is tiny and there is even a clip for hanging anywhere. After testing several other products (and great brand) I do not find any equivalent in terms of lifespan. So considering the price you can charge.
