1-Wire access credential

The RW1990 RFID Ibutton is a field-programmable 1-Wire access credential built for rotating deployments — student housing, co-working spaces, locksmith universal stock, and any site where credentials change hands monthly. Each unit ships blank and accepts a write command through a standard TM handheld programmer: encode a UID, lock it, deploy. When the tenant moves out, re-write a new UID onto the same hardware and hand it to the next person. Same 16 mm stainless steel housing, same 15 mm wide ABS handle (55 mm total), same 1-Wire contact bus as the read-only version — but with reusable hardware that eliminates per-tenant replacement cost. 2,000,000+ monthly capacity, 340+ B2B accounts, seven stock colours, custom Pantone available. Free 10-unit evaluation kit with programmer ships within 3 business days.