Brand Manolins Model A4988 Quantity 1 Color Black + yellow Material PCB Features Dimensions (cm):2.7 x 4.6x 1.5; Weight (kg): 0.08; A4988 includes a current stabilizer w/ fix cut-off time; The stabilizer can work under slow or mixing attenuating mode Specification Suitable for stepper motor w/ 8~35V / 2A; With simple stepping and direction control port; 5-stepping modes: Full half 1/4 1/8 1/16; Adjustable potentiometer can adjust max. current output; W/ auto current attenuation mode check and choose; Over-heat close underload lockout and cross current protection; Grounding short and loading short protection Application Easy to operate; VDD and GND need 5V voltage; VMOT and GND need 8~15V voltage; Full stepping mode: MS1 MS2 and MS3 are grounded; More accurate: 1/4 stepping mode English Manual/Spec E-format Other A product for Arduino that works with official Arduino boards. Packing List 1 x Driver board