New Upgraded Ender 3 Pro V 4.2.7 silent boardGermany imported TMC ultra-quiet motor drive chip, ultra-quiet system design, so that the machine is always running at low decibels (<50dB). | Exquisite PackagingThe use of internal foam protection, external sturdy cardboard box to protect the silent motherboard intact during long transport. Exquisite gift box packaging is also the first choice for gifts. | Plug in and PlayIt pre-installs the Ender-3 Pro firmware, you can plug in and play, easy to replace and use. Thermal runaway protection is enabled. The Board is Optimized by Circuit, effectively solve the Heating Problem |