125 KHz ID Tags RFID ABS Coin with Hole Prototyping Boards It can be used to

It can be used to sense movements in 2 directions(axes)

along with secure packaging

3V for example) to 'lv'

One relay output control interface

If want you can make NFC based security door lock and for that you will need a few essential components like:

125 KHz ID Tags RFID ABS Coin with Hole Prototyping Boards It can be used to125 KHz ID Tags RFID ABS Coin with Hole This is a 125 KHz ID Tags RFID ABS Coin with Hole. Uses EM format RFID signal: 125Khz Non contact reading Very durable (Over 20 years usage life) Completely waterproof, all weather that can be used reliably in rainy, snowy, dusty, or other adverse environments Passive and no power required for operation. From 125kHz low frequency to 13. 56MHz high frequency as well as with ultra high frequency. Thus providing an