Google is publicly releasing design information for the Fitbit Air fitness tracker to encourage users and independent creators to build accessories. Multiple outlets report that Google has published technical specifications and 2D CAD drawings for the device, which are intended to help people design accessory bands or related add-ons. The materials include mating dimensions and tolerances, along with guidance on attach and detach forces, according to Google’s posted store information. The company also lists considerations for accessory builders such as sensor clearance and pressure, secure retention, and using skin-friendly materials. The releases appear aimed at moving beyond information that would normally be limited to third-party accessory manufacturers. Google’s store page frames the release as support for independent designers and artisan makers, noting that the community has already produced its own accessory concepts since the tracker’s recent launch, including options such as bicep bands. Overall, the published documents are positioned as a set of design guidelines so hobbyists can create higher-quality accessories that fit and function properly with the Fitbit Air hardware.