1.) Please charge the device for 1 hour.
2.) After charging, turn the device on; you should see a light come on.
3.) Increase the power by pressing the '+' button a few times.
4.) Place your finger across the round button in the center while simultaneously touching the other part of the metal body.
If you can feel the pulses after this test, your device is working correctly, and you can begin to use it in the palm of your hand.