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The Nima safety light has a 'weak spot' on the back where is attached to the base, any abrupt hit can easily brake. This holder protects from that.
This holder is compatible with my own design seatcase: https://www.shapeways.com/product/EEWNDMTW4/bicycle-saddle-bag-seat-case-for-fizik-saddle-27g?li=search-results-1&optionId=56589470
or any Cateye standard Clip attachment system.
What's in the box:
Cateye Nima Holder compatible with standard cateye