Scannable - helps Arborists, Rope Access Technicians, Riggers, and Rescuers easily manage PPE and safety equipment. The easiest way to manage equipment and compliance. Equipment management software and Smart PPE™ for safety teams.
 
These tags only work on metal. They won't read until you have placed them on a metal surface. 
Since launching the world's smallest and only NFC tag appropriate for use on carabiners, we haven't rested. Instead, we've taken our learnings and gone back to the drawing board!
This Carabiner Tag is lower profile and has no hard edges, making it flush with most "I-beam" or "H-frame" style carabiners. 

It is also low-profile enough to be suitable on flat device surfaces. These tags need to be applied with an epoxy adhesive. Check out the Scannable website blog for adhesive recommendations. 
Available in Lime for those who like to stand out, or Grey (special order) if you need a something a little more stealthy. 
This tag needs to be placed on metal for the phone to scan it.