From Replimat Labs:

Product information “DragonDinghy”

DragonDinghy is a multi-purpose expansion board for Klipper. See below for full specifications.

Documentation

Box Contents

• DragonDinghy PCB
• 10x PH Housing, 2 pin
• 7x PH Housing, 3 pin
• 5x PH Housing, 5 pin
• 60x PH Crimp Contacts
• 3x 1×4 Pin Header
• 10x Jumper with Handle

Technical specifications:

• 9 Thermistor Inputs
  • 5 Inputs best suited for 100k NTCs, like Generic 3950 or ATC Semitec
  • 4 Inputs best suited for PT1000
• 4 Fan Outputs
  • 2 GND-switched PWM fan ports with optional tachometer support, 1 A per port
  • 2 4-pin Fan Ports, 2A maximum per port
  • Each fan output supports 5V, 12V and 24V fans
• 4 RGB Outputs (compatible with WS2812B, SK6812 and Adafruit Neopixel)
  • Integrated diagnostic SK6812 RGB LED
  • up to 2A (shared with other 5V devices and across all 4 ports)
• 2 IC ports
• CPU STM32F072
• Integrated 12V 2A and 5V 2A step-down converters
• Usage via CAN or USB (or…use it as an USB to CAN bridge?)
• Raspberry Pi compatible mounting pattern
• Extensive Quality-of-Life Features
  • All ports are labeled on the board with the pinout and the respective pin for Klipper
  • Klipper menuconfig settings are printed on the board
  • Diagnostic LEDs for fan ports, DFU mode and power supply status
• Protection Features
  • Reverse Polarity Protection on the main input
  • Thermistor inputs withstand accidental short to 24V