RFID Button - 16mm 125kHz

Description
This is a simple， thumbnail-size RFID tag. These tags are great for sensing presence， identification， etc.， and they're small， so they can be easily sewn into clothing or inserted into enclosures. Each tag comes with a unique 32-bit ID code and is not reprogrammable. The carrier frequency of this tag is 125kHz， so it works great with our ID-2， ID-12 and ID-20 RFID readers.
We tested this RFID tag with one of our ID-12 readers and measured a maximum read distance of about 32mm.
Features
32-bit unique ID - non-reprogrammable
125kHz read frequency
EM4001 ISO based RFID IC
Manchester encoding
Diameter：16mm
Thickness：1.85mm