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This item is limited to quantities on hand. Once in-stock quantities sell out, this item will no longer be available.
The Roller Switch is a handy Bit -- it has a little lever with a wheel and activates when something moves past it. You can also flip the mode switch to make it turn off when the lever is pushed in. Try that mode with an LED to make a fridge light.
Check out the‚ Tips + Tricks‚ from littleBits for more ideas on using the roller switch.