5/10/100 125Khz 13.56Mhz TK4100 ID & FM1108 IC Dual Chip RFID NFC Keytag Key Fob

Chip: TK4100 (ID) + FM1108 (IC). Frequency: 125KHZ+ 13.56MHZ. Signal Generator. Adapter Module. Display module. Step up module. Step down module. Wireless module.

eBay