I've forgotten the year of purchase, but it might be about five years ago. It's currently working without any problems. I'm writing this description with this keyboard. During the time I've owned it, there were also long periods of non-use. Perhaps because of this, the rechargeable battery is still good (it seems you can replace it from the slot on the back, so please search the web). The items for shipping are in the condition shown in the photos. There are no instructions, etc. I will clean and disinfect it with alcohol before packing. Size: Width 43cm / Depth 16cm / Thickness 1cm I cannot check or reply to messages during the day. To prevent any trouble, I'm sorry, but I would appreciate it if you could transact at the listed price.