EM4222 chip features Manufacturers to write 64-bit unique ID number High speed: 256k bits Frequency independent: can be used in the 869MHz/902-928MHz/2.45 GHz Chip has the oscillator and rectifier Low voltage operation: as low as 1.0V Low power consumption, low cost benefit Working temperature: -40° С ~ + 85 ° C (-40° F ~ + 185(° F) EM4223 chip characteristics Interface compatible with ISO 18000-6A Support Auto-ID center defined EAN, UCC …