2PCS TMC2208 V1.2 3D Printer Stepper Motor Driver, Upgrade TMC2208 Stepper Driver Module with Heat Sink Screwdriver for 3D Printer Controller Mother Boards Reprap MKS Prusa i3 Ender-3 Pro

TMC2208 driver needs extra fan to cool it, otherwise the high temperature may destroy it.

Do not connect the motor when measuring the voltage, otherwise it is easy to burn the driver.

Power should be connected when measuring voltage, do not just connect USB power supply.

Package Includes: 2 X TMC2208 Driver 2 X Heat Sink 1 X Screwdriver See more Features & details Features TMC2208 is an ultra-quiet two-phase stepper motor drive chip, continuous drive current 1.4A, peak current 2A, voltage range 4.75V-36V, 256 subdivision.

The flexible microPlyer interpolation unit provides up to 256 subdivisions, allowing perfect sinusoidal control even in systems with limited pulse frequencies; these are also designed because stealthChop2 ultra-quiet technology is widely used in 3D printing.