This lightweight RFID pigeon ring is made from durable ABS, PP, and PE materials and is designed for race pigeon identification and poultry management. It supports ISO11784/11785 FDX-B protocol and operates at 125kHz or 134.2kHz frequencies with EM4305 or Hitags256 chips. With a 10mm diameter and 2g weight, it offers up to 4cm reading distance (depending on the reader). Available in green, red, blue, black, and yellow, it functions reliably in temperatures from -20°C to 60°C.