The Yamaha SHS-10 is Keytar released in the 80's.
It features a mini Keyboard, with 32 keys (3 octaves), a pitch bend wheel, a FM Synth offering 25 different voices outputting 6 note polyphony.
It also features a chord sequencer to make your performance a little bit easier.
It has a older, 5 pin din connector which transmits MIDI out, so you can connect it to a sound module or computer via a MIDI to USB Interface. One of it's attractive features of the day was the ability to transmit drums on a seperate midi channel, so you could connect it up to an external drum machine.
Overall this is a much loved vintage Keytar - the combination of cheesy 80's FM Synthesised sounds, built-in rhythmic percussion and it's overall design attract musicians with it's charm.