A smart business card that demonstrates the
ADT925-14E 1.1 x 1.1 mm DFN4 TMR Switch sensor.
The board can be plugged into a USB TYPE-A connector, such as those on a computer, for power. An LED on the card shows when the sensor is activated. A small neodymium magnet is included to activate the sensor.
You can carry it with you so you’re always prepared to demonstrate the high sensitivity, low power, and small size of TMR sensors.