اندازه: 2.5×2.5cm Power supply: 2.7~5V@30mA Work frequency: 125KHz Support chip: ATA5557, T5567, T5577 or compatible chip (default format Manchester code RF/32) رابط: درگاه سریال (فرمت TTL-232) فاصله خوانده: <7سانتی متر, write distance: <6سانتی متر (T5557, T5567, T5577 Chip R/W Module has read-only and read-write two models, according to the project needs to choose the right module.)