Flipper Zero is an Arduino-compatible board that features an NFT reader and transmitter, an RFID transmitter, and even an IR blaster. This means you can read and transmit data from simpler key cards and even simulate so-called iButtons, those little round metallic keys used in some security gates. The $200 device can be used for some pretty nefarious purposes, but for ethical hackers, it could be a useful tool for testing your own security and experimenting with RFID, NFC, and IR connectivity.”]
Source: https://gizmodo.com/this-unassuming-little-device-can-hack-your-smart-home-1846448809