Here are the Strumulele (Strumstick Uke, U-26) and the Chromatic D Strumstick (D-CHR). These are both Chromatic Instruments.
Chromatic means are fretted to play in every key (all the sharps and flats included), unlike the Junior and Everybody Strumsticks. The term No Wrong Notes does not apply, they are harder initially, but if you want to play in any key or to play more complex music (think modern Jazz and Classical music) and serious Blues, that is what Chromatic fretting gets you.
See Individual Product pages for Details