The battery of English level 4 and 6 headphones is size AA.
The battery in level 4 headphones is usually an AA battery. Individual headphones with radio functions will have different models and the batteries will also be the same. Battery models are generally divided into: No. 2, No. 3, No. 5 and No. 7. Among them, No. 5 and No. 7 are particularly commonly used. The so-called AA battery is No. 5. Battery, and the AAA battery is battery No. 7.
Battery
Battery refers to a cup, tank or other container or part of a composite container that contains an electrolyte solution and metal electrodes to generate electric current. , a device capable of converting chemical energy into electrical energy. It has positive and negative poles. With the advancement of technology, batteries generally refer to small devices forbefore producing electricity.
Like solar cells.
The power generation parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as a power source, you can achieve power with stable voltage, stable current, stable power supply for a long time and little influence from the outside world. The battery has a simple structure, is easy to carry. simple and easy charging and discharging operations, and is not affected by the influence of external climate and temperature.
Performance is stable and reliable and plays a big role in all aspects of modern social life.
Before using the Level 4 headset, first enter the function keys of the headset, which are the power key, the M key (used to store or delete channels), and the + button (search channels forward, increase volume), - button (search channels forward, increase volume), in addition there is an LCD screen. First, take out your own Level 4 and 6 English listening headphones to make sure they are fully functional and can be used normally.
Press and hold the power button on the hearing headset, which is the red button on the hearing headset. Turn on the listening headphones. At this time, the earphone screen will display the listening channel. Adjust the + and - keys to manually search the earphone listening channels. After manual search, enter the fourth and sixth level listening channels. .
To adjust the earphone listening volume, first press and hold the power button to enter the volume adjustment module, then press and hold the + and - keys to adjust the volume earphones. After rsetting, press the on/off button T, it can be used normally.