Size: 3x15mm, 2.12x12mm, 2.12x8mm, 1.4x8mm, 1.25x7mm
ICAR certificate (1.4x8mm chip / 2.12 x 12mm chip)
Global Unique Number
Chip: EM4305/T5577/EM4100 Hitag S256/Hitag S2048
Frequency: 134.2 KHz, 125 KHz, 13.56 MHz.
Weight: 95 ± 20mg
Maerials: Bio-glass.
Protocol: ISO 11784/5, ISO14443A, ISO15693

3*15mm is used for large animal, such as horse, cow, etc.
2.12*12mm is used for animal, such as cattle, sheep, goat, etc.
1.4*8mm and 1.25*7mm are used for small animal, such as rabbit, dog, etc.