User manual SONY ECM-909A

[. . . ] , Make sure the e and E ends of the battery are in the Two-way power system (plug-in power or battery) There is no sound or interfere (noise). When you turn the power on after turning the power off, the battery check indicator lights dimly or does not light at all. [. . . ] , If the battery check indicator lights dimly or does not 1 Open the battery compartment Push the hook to the left using a pointed object, such as a ballpoint pen, and pull out the battery compartment. If the battery becomes weak, the battery check indicator lights dimly or does not light at all. When you turn the power on, the battery check indicator should light momentarily. If the battery is weak, the indicator lights dimly or does not light at all. C) A new alkaline battery allows continuous operation of the microphone for about 80 hours. ⷠWhen you retract or pull out the cord, you may feel friction. In this case, retract or pull the cord again after you pull or retract it completely. Keep the microphone away from extremely high temperatures (above 60°C or 140°F) and humidity. ⷠIf the microphone is placed near speakers, a high pitched noise may be heard (acoustic feedback). This is caused by the microphone catching sound from the speakers repeatedly. [. . . ] ⷠIf the microphone is placed near speakers, a high pitched noise may be heard (acoustic feedback). This is caused by the microphone catching sound from the speakers repeatedly. [. . . ]