girman: 2.5×2.5cm Power supply: 2.7~5V@30mA Work frequency: 125KHz Support chip: ATA5557, T5567, T5577 ko jituwa guntu (default format Manchester code RF / 32) Interface: serial tashar jiragen ruwa (TTL-232 format) karanta nesa: <7cm, write nesa: <6cm (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.)