Joy-Con (Right) Gray With strap It can be used when connected to the main unit, but the A button is slow to respond and doesn't work unless pressed firmly. When detached from the main unit, the SL and SR buttons do not respond. Therefore, it can only be used when connected to the main unit. How about it for parts or for those who can repair it themselves? For those who understand that this is a junk item. Instant purchase welcome Anonymous delivery