RioRand Motor Driver (With Heatsink,3D Printer Reprap Prusa, Mendel, 5 X A4988) Brand: RioRand All epoxy sealed containers with Waterproof Housing; Non-isolated High efficiency: &gt;96%; Reliable, low heat dissipation max. 40 With overload / over-current / over / low voltage protection, stable performance Widely used in Car device, such as LED Display, Hard Disk Player, MP3, DVD, GPS, etc.