Here is a simple accessory that you can easy use to attach Estimote iBeacon to your stuff. Such as your backpack, your dog, your vending machine coffe key leash, or anything else through a max 2cm wide belt. You just have to print it and attach it using the Standard Estimote adhesive.
STL provided with AND without supports.
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Disclaimer: Estimote and iBeacon names and trademarks remain the property of their respective owners.