Driver Chip:THB6128 with over current and over temp protection.
Made with 4 Layer RoHS PCB, strong and durable.
1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64 and 1/128 Microstepping.
Top mounted heat pad, this makes heat sinking a lot easier and does not rely on the already small PCB area for heat dissipation.
Easy to use DIR/Step interface.