This is a glass, cylindrical RFID tag; it's very similar to those implanted into pets for identification purposes. 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 10mm.
***PLEASE NOTE*** We do not recommend this device for implantation inside humans or animals without extensive surgical and sterilisation procedure knowledge on behalf of the user. The device has glass parts, which if positioned incorrectly could cause harm if broken. Infection caused by an unsterilised RFID tag could cause serious medical problems with dire consequences.