Another point to note regarding the Logitech service policy: a keyboard mouse set having been broken after a few months of use, we were very surprised to hear from the Logitech service that the products were purchased from Amazon not covered by the warranty (authentic emails were stored). The defective product was eventually repaid by Amazon after we communicated to Amazon email evidencing the refusal to take collateral from Logitech. How to understand the reason for such a deplorable policy of VAS which makes the distinction between a product purchased through the Logitech store Logitech (as guaranteed!) And bought a Logitech product (slightly cheaper) via Amazon ? The answer is self-same: Logitech wants us to buy via their online store, where margins are certainly higher. Poor!