Operation and function of the scale at first ok. After about three months, she could no longer be switched on and off. If it was then turned on again, then it was only remove about batteries off. Well I thought clearer warranty. Amazon called lt. Kundenbetreueng Amazon it would be the easiest thing the scales to be sent directly for manufacturing with warranty card, invoice, etc. So far so good and done so. Balance to the manufacturer ADE. Waited three weeks, nothing happens. Mails sent to Herstelle ADE. First Mail, nothing happens. Second mail, aha reply. Where I to the Libra had sent there and also Amazon would be completely wrong here, the manufacturers could not fix it and would pay only for cases that are older than three years, ie after the warranty period - uh ?? Called again and explained Amazon. I should send it to the Amazon balance now that would have it repaired. Aha, well - unfortunately I have at the moment neither scale nor anything else. Shall therefore try to get back the balance by the manufacturer and send back to Amazon .... ADE Germany Digital body analyzer scale BA 830 Bettina