Features: Easy step and direction control interface,easy to use. Six different step resolutions: full step, half step, 1/4 step, 1/8 step, 1/16 step, 1/32 step. Can be operated between 8.2V and 45V and delivers up to approx. 1.5A per phase.With 2.5mm pins. Successor to the A4988, 4-layer for improved heat dissipation and many times more abrasion resistant. The stepper motor driver (pins soldered) is a breakout board for DRV8825 drivers for stepper motors with bipolar micro-stepper operation. Specifications: Package Dimensions : 15.6 x 13.6 x 3.4 for cm; 20 Grams Manufacturer : PoPprint ASIN : B06Y6536CB Package Includes: 5PCS x DRV8825 Stepper Motor Driver Module 5PCS x Mini Heatsink note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!