DON’T BUY THIS PRODUCT Comforting to know that I’m not the only one taken in by this scam. Device eventually arrived, instruction no use at all, eventually worked out how to charge it by looking up similar online. However, now charged it doesn’t display info unless top of front panel pressed hard and constantly held. Useless! Eventually got a reply to repeated complaints, seems to get full refund expected to send back to an address in China at own cost, doubt the likelihood of receiving said refund. It's a disgrace that they can get away with it. I bought via PayPal so hopefully covered by their buyers promise, fingers crossed.