All new TASER devices come pre-activated. Only older models of the TASER C2 may need to be activated. This can be determined by examining the LED light located beside the button trigger which can be revealed by sliding back the safety cover. If the LED light is GREEN, the device is already activated. If the light is RED, the device needs to be activated. Email email@example.com with your serial number and that your device needs to be activated for fastest response.