[. . . ] in order to avoid untune consumption of the inner battery: if pilot lamp of the wireless microphone (1)remains lighted, it means that the battery has no more power: (2)the lamp must flash only for the time of the switching -on; this indicates that the microphone works well. [. . . ] When switches the power switch to "on" position, then the power indicator lights, indicate the apparatus is on. When switches the power switch to "off"position, then the power indicator lights, indicate the apparatus is off. We congratulate you for the choice of this excellent professional apparatus microphone which will give you outstanding results at the high fidelity. Be sure to use good quality long life 9V alkaline battery only. FEATURES: "STAND-BY" funciton. Steel net based to prevent from rolling. SWITCH COVER GRILLE HOLDER SWITCH TUBE ANTENNA 1. Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the use's authority to operate the equipment. POWER LED LIGHT OFF ON 1 C H OFF ON 2 [. . . ] Steel net based to prevent from rolling. SWITCH COVER GRILLE HOLDER SWITCH TUBE ANTENNA 1. [. . . ]