The Speed Bully is awesome. Standard High Output fans do not have speed adjustments or even a simple off button. The speed bully allows you to adjust fan speed in any hydroponic grow room or grow tent setup. It works with any size fan and is fuse protected to keep your high quality output fans safe and secure. Keep air constant and running smooth in any grow size or grow light system.
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GrowAce


mine came without a fuse. what fuse do i buy for it?