Adopts the newest chip; CCL includes more copper; With heatsink and dual side adhesive tape; Pin socket has been soldered; Size: 1.5 x 2mm; Driving current: 2A; Supports 3D printers: Prusa Mendel ultimaker printbot and makerbot; Can operate stepper motor under full / half / 1/4 / 1/8 / 1/16 duplex mode; Driving voltage: 35V +/-2; With adapter and over-current protection; With auto current attenuation check / choose; With over-heat close undervoltage lock and crossover current protection; With protections of grounding short and loading short; A product for Arduino that works with official Arduino boards.?