This Casio CZ-1 keyboard synthesizer comes with a correct power supply and a carrying bag. It's a great option for musicians on the go. There's a minor issue where one key (D1) is slightly cracked, but don't worry, it doesn't affect the functionality at all.

Using this Casio CZ - 1 keyboard synthesizer is easy. First, connect it to the correct power supply that comes with it. You can then start playing your favorite tunes. The carrying bag is handy for taking it with you to gigs or practice sessions. When it comes to maintenance, keep it in a dry and clean place. Wipe it gently with a soft cloth every once in a while. Although the cracked key (D1) doesn't affect function, be a bit careful around it to avoid further damage. Also, don't expose it to extreme temperatures or humidity as it may harm the internal components.