Atmotube PRO comes precharged. But to prevent accidental turn-on during transportation, the main button is disabled. To activate the device, connect it to the charger.Atmotube PRO First Switch-OnRelated ArticlesAtmotube PRO Recovery InstructionsI cannot connect to my Atmotube PROHow do I charge Atmotube?Switching on your Atmotube PRO 2 for the first timeTurning Atmotube PRO 2 On and Off