MKS RUMBA+  is a advantaged and integrated mainboard controller which features ATmega2560 on board with AVR processor. Its circuit is optimized based on original, which makes it more stable and compatible. MKS Rumba+ allows six motors, which is a good electronics solution for dual or triple extruders printer .
Packing List
1*MKS Rumba+
1*USB

Features
1.  It features 2560MCU all in one controller board, compatible with all Ramps1.4 firmware.
2.  Standard MEGA256016U2 serial drive that enhances firmware uploading more stable.
3.  Compatible with MKS TFT touch screen.
4.  Compatible with LCD2004,LCD12864 and MKS MINI12864LCD.
5.  Flexible to replace stepper drivers, such as 4988,8825,LV8729,TMC2100,etc.
6.  Available to assemble high current driver by MKS CD, such as TB6600,LV8727,LV8729.
7.  High quality MOSFET, excellent cooling.
8.  Available 24V input. On the same Watt, allow to reduce current to its 1/4.
That effectively solves heating problem of bed mosfet.
9.  Support 12-24v power input with special power chip.
10. After repeated testing, strongly improve its stability, cooling and usability.
11. Available pinouts enhance much expansibility.

PS: you can follow up the link http://olearn123.en.made-in-china.com to download the firmware