ITEM NAME:1 Unit Driver Module With Screwdriver Durable Electronic Accessories Description: 1. ST820 is an easy to use driver board for 3D printers, routers, etc. 2. Provides a compact solution for stepper motor drives with minimal external equipment, without the need for additional components. 3. Fully compatible with RepRap Mega Poloulo Shield (RAMPS) or other similar fuse manufacturing 3D printing platform, representing a quick alternative to similar solutions. 4. Unlike market solutions, the ST820 helps customers truly take advantage of the high microstepping solution. 5. Peak current regulation through trimmer ,with a microstepping resolution up to 1/256th of step – Over current, short-circuit and over temperature protections. Specification: Supply voltage from 7 V to 45 V Peak current: 2.5A Size: 10.0 x 10.0 x 4.0 cm Scope: 3D printing Package Includes: 1 Piece ST820 Driver 1 Piece Heat Sink 1 Piece Screwdriver SKU: DMO0021161463019425.1 Piece Screwdriver. 1 Piece ST820 Driver. 1 Piece Heat Sink. People always bought together with. Size: 10.0 x 10.0 x 4.0 cm.