Hi,
I don't think this keyboard is still in production. As I got it for a christmas present when I was 10...I am now almost 22 :).
It has 61 keys which is plenty to play pretty much any song.
64 tones, though I only really use the standard piano sound because it's so good.
64 rhythms, 32 real songs and 32 free sessions.
I can't remember what it's called (polytone or something), but 16 different notes can be played at any one time (well enough for any song with complex chords on both left and right hands).
It takes 6 AA batteries and that lasts for quite a while, or you can use the 9v (-) jack on the back.
It also has a headphone socket, but thats as far as the connectivity goes I'm afraid.
Build quality: It has lasted 12 years for me (during teenage years), still in pretty much perfect condition with no quality loss or anything like that.
It has a very good piano sound, people have complimented how much like a real piano it can sound, compared to the electronic-y sound that a lot of other keyboards have. It is very ideal for a beginner and maybe even an intermediate player alike. The sound bank and backing beats on it are very out-dated now but if you don't need them, this is a good keyboard.
I play songs like: Everything I do (Bryan Adams) , Right here waiting (Richard Marx) , Let it Be (Beatles) , Canon (Pachelbel) and many other random songs. All sound pretty much perfect.
One niggle I have is as this keyboard is quite old, it doesn't have the touch sensitive volume mode, which can be useful for some songs and to add to the realism of the piano sound.
Well that's about all I can think of at the moment, but as a conclusion, this is a great beginners keyboard and can last several years through intermediacy.