Features 1、256 SUBDIVISIONS: Continuing the characteristics of TMC series drivers, the chip is expanded to 256 subdivisions internally, with good mute effect. 2、LARGER CURRENT: The driving current is larger, the maximum peak current is 2.5A, and the stable printing current is 1.7A, stable and reliable. 3、WITH HEAT SINK: The stepper motor driver is equipped with heat sink to ensure good heat dissipation, lower heating efficiency and safe operation. 4、ALUMINUM ALLOY: The heat sink is made of aluminum alloy, with light weight, corrosion resistance, wear resistance and long service life. 5、FOR 3D PRINTER: The stepper motor driver module has ultra quiet operation, is a common accessory of 3D printer, easy to install and replace. Specification Item Type: Stepper Motor Driver Module Material: Aluminum Alloy Output Current: 1.78A Recommended Working Current: 0.8A Microstep: 256 microstep subdivision Load Driving Voltage Range: 5.5-36V IC Logic Working Voltage: 3.3/5V Package List 1 x Stepper Motor Driver Module 1 x Heat Sink