Following a small problem, I contacted the seller who answered me immediately. The problem was solved very quickly. The seller really has a great business sense and I am delighted. I can only put him top marks. I will definitely come back to this site when I need because I am very happy with my purchase. Thank you to Melanie for her kindness and advice This mouse is perfect for me. I like ergonomics, long flexible wire, these handy control buttons and its price ... . MJS