The SF404 audio power amplifier driver circuit is a product of Shanghai Radio 7 Factory. It can be equipped with a pair of power tubes and a small number of RC components. It can be an OTL or BTL power amplifier. The power amplifier composed of this circuit has a wide power supply voltage range and output. power
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Wireless earphones are divided into three parts.The first part is the sound source,the second part is the receiver, the third part is the headset part,the function of this part is mainly used to convert the signal sent by the mobile phone or receiver into sound and then transmitted to the ears of people. Wireless earphones and wired earphones compared,the difference in sound quality is not big. Wireless is more convenient,mainly in the middle of the line is replaced by radio waves. Compared with wired earphones, wireless earphones have these advantages, abandon the trouble of wired,do the real wireless structure, freedom of movement.A variety of ways to use, a variety of functions, sound quality, noise reduction, call has been greatly improved.It is equipped with a portable case with both charging and storage functions. It is very convenient to charge the dead earphones automatically by putting them into the case.
The latest wireless headset has a professional learning scheme,can learn the functions of various home appliances remote control (TV, VCR, DVB, DVD, etc.),can also be used as a digital SET-top box remote control. Wirelessly listen to most electrical appliances with audio output. Using wireless earphones, you can enjoy exciting programs freely when the TV is silent.Place THE TRANSMITTER NEAR THE elderly, infants, patients and other people in need of care. Use the receiver to hear the voice of the person being cared for, and care is convenient and easy. Adopt THE ORIGINAL IMPORTED TRANSMITTING TUBE AND CORE technology, HIGH sensitivity ANTI-interference, strong signal, outstanding effect, effective range (less than) 30 meters, can be received by the wall.
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