Multi-Platform BT Keyboard, Wireless Bluetooth, Silver Color Purchased new on Amazon for 2,849 yen. Can connect to two Bluetooth devices simultaneously, and you can switch between devices with the channel switch. All keys worked without any problems. When I used it once, I got the impression that the battery lasted quite a while, and it still had power when I turned it on again after a few weeks. I am selling it to organize my home since I hardly used it. The only thing that might be a concern is that there is a mark where a sticker was peeled off on the product box. Please purchase only if you understand the condition. Keyboard Computer Desktop iPhone iPad Bluetooth Wireless