Note There is a new version V4 2 7 32bit main board only for selling in CN warehouse US and UK warehouse will send v1 1 5 or V4 2 2 silent mainboad randomly Please note before placing an order Please understand Features 1 With special power chip support 24V power input2 The circuit board is optimized by circuit effectively solve the heating problem3 Can work with E Z Y X a xis motor4 With USB interface easy to operate5 The newest version with super silent TMC2208 driverTutorial of burning firmware click to download Ender 3 Ender 3 Pro use the same main board but different firmware plz select the type you needPackage Included 1 x Main board