To use the USB bug detector, follow the steps provided on the back of the board:

• insert a CR1220 coin cell battery in the USB bug detector for it to be operational (a CR1220 coin cell is provided with the tester)
• press on the RESET button to arm the test
• the BUGGED LED should be off
• plug the USB cable in the USB receptacle
• if the BUGGED LED switches on, the USB cable embeds an integrated circuit (e.g. a bug)
• if the BUGGED LED remains off, the cable is same to use

After the test, to save power, press again on the RESET button.

To ensure that the USB bug detector works, after pressing on the RESET button, press on the SIMULATE button. This will simulate a USB plug with integrated circuit. The BUGGED LED should switch on. This also ensures the battery is not empty.

When the LED is on, the USB bug detector draws 3 mA. When the LED is off, the USB bug detector draws 64 nA. This results in a idle battery life of 62 years (for a typical 35 mAh CR1220 battery). This is on par with the self life of the battery (~ 1%/year).