Deal_win (12pcs /lot(assorted color))Writeable Programmable Colorful Waterproof NFC Keyfob Keychains Tags Compatible with All Current NFC Capable Devices, Phones, Tablets and Computers 13.56MHz RFID IC Key Tags Keyfobs Token NFC TAG Keychain For Arduino Writeable & Programmable:compatible with all current NFC capable devices, Phones, Tablets and Computers Memory Size: 144 bytes; Usable Memory Size: 137 bytes; Waterproof, Drop-Resistant, Anti-high temperature; Gorgeous design with a variety of colors,Blue Black,Yellow,Orange,Red,Gray. The best NFC chips (NTAG, 203) from NXP Semiconductors. Operating Range &lt; 2cm (depends on device) ; Operating Frequency: 13.56 MHz; Operating Temperature: -25+55