What does that mean? You get 10% off most items when using the code:
Details from the shop:
Use discount code SPRING10 at checkout to receive 10% off your order! This sale won’t last long so don’t miss out on your chance for great savings on all these products listed below! Everything listed here is in stock and ready to be added to your cart. Eurorack modules, synthesizers, grooveboxes, cables, studio and recording gear, mixers, pedals, effects and more!