Brand Robotale Model A4988 Quantity 1 Color Black + red Material FR4 Features Built-in converter; Easy to operate; Output driving performance up to 35V +/-2A; Great for dealing with complicated useless or overload applications of microprocessor Specification Low RDS output; Auto current decay mode check / choose; Mixture and low current decay mode; Sync rectification for lower power dissipation; Built UVLO and cross current protection; 3.3V / 5V; With over-heat off circuit and short protection; Five stepping modes: full 1/2 1/4 1/8 1/16 Application 3D printer English Manual/Spec Yes (https://app.box.com/files#/files/0/f/1155511757/1/f_10407098649) Packing List 1 x Driver