The Waldorf KB37 Controller Keyboard and Eurorack Case is a high-quality modular synthesiser with 37 semi-weighted keys. It features a range of input/output ports including USB out, MIDI in/out, and two pedal inputs. With features like pitch wheel, aftertouch, modulation wheel, and an arpeggiator, this keyboard offers a versatile and expressive sound for musicians and producers. Its hybrid analogue/digital design, along with USB compatibility, makes it a powerful tool for creating and manipulating sound in real-time. Overall, the Waldorf KB37 is a top choice for those looking for a professional-grade synthesiser.

Yeah yeah.. AI got some of it right.. 
Well Obviously it's not a Synthesiser, but it is a great case in which to build your own, custom synthesiser from modules of your choosing. 
Excellent built in power with no ripple or noise.. I have mostly used thsi with AJH Minimod Modules and it worked flawlessly

• Arpeggiator (CV or MIDI)
• Master clock source
• Note Priority switching Velocity and Aftertouch keyboard
• Built-in Glide/Portamento
• Balanced 1/4" Outputs 
• Headphone Output
• VERY rugged steel case