7021 models(Black mono): Adopt TDA7021(Or KA22429)Chip without squelch, that is, there will be a rustling noise when it is not received, with a waist buckle, the overall size is 8X5.5X1.5cm,Adopt 2 Section No. 7(AAA)Battery powered, mono, receiving frequency(87-108MHz)Continuously adjustable, manual tuning. Without external amplifier, matching earphones, battery not matching.
![](https://img.alicdn.com/imgextra/i3/12672811/TB2wtCfwMJlpuFjSspjXXcT.pXa_!!12672811.jpg)
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7088 models(Blue mono): Adopt TDA7088(Or CD9088)Chip, with quiet noise, that is, keep quiet when not received, with waist buckle, the overall size is about half the size of a cigarette box,Adopt 2 Section No. 7(AAA)Battery powered, mono, receiving frequency(87-108MHz)Continuously adjustable, button tuning.Without external amplifier, matching earphones, battery not matching.
![](https://img.alicdn.com/imgextra/i3/12672811/TB2Hj3bfrsTMeJjSszgXXacpFXa_!!12672811.jpg)
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1691 models(Black mono):Using CXA1691M(Or CD1691CB)Chip without squelch, that is, there will be a rustling noise when it is not received, with a waist buckle, the overall size is 8X5.5X1.5cm,Adopt 2 Section No. 7(AAA)Battery powered, mono, receiving frequency(87-108MHz)Continuously adjustable, manual tuning.Without external amplifier, matching earphones, battery not matching.
![](https://img.alicdn.com/imgextra/i3/12672811/TB2wtCfwMJlpuFjSspjXXcT.pXa_!!12672811.jpg)
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1238 models(Black stereo):Using CXA1238M(Or CXA1538M)Chip without squelch, that is, there will be a rustling noise when it is not received, with a waist buckle, the overall size is 8X5.5X1.5cm,Adopt 2 Section No. 7(AAA)Battery powered, stereo, receiving frequency(87-108MHz)Continuously adjustable, manual tuning.Without external amplifier, matching earphones, battery not matching.
![](https://img.alicdn.com/imgextra/i3/12672811/TB2wtCfwMJlpuFjSspjXXcT.pXa_!!12672811.jpg)
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5807 models(English level four and six stereo): What you see is a personalized FM stereo radio without a shell, which can be used as long as the battery is installed. The receiver adopts DSP FM receiving chip RDA5807 or RDA7088, with small volume and external dimensions(With battery compartment): 53X25X25mm, FM stereo, good sound quality, high sensitivity. Two-section number seven(AAA)Battery powered. The volume, channel search and power switch are all operated by keys. The receiving frequency range is 76-108MHz. It can be used to receive English Test Band 4 and Band 6 broadcasting and FM public broadcasting in this frequency band. Cost-effective. It can work with the battery installed, without external amplifier, matching earphones, and battery not matching.This machine has no real meaning of power-down memory receiving frequency and volume function. The frequency and volume can be saved after pressing the power button to shut down, but the frequency and volume are not saved after removing the battery.
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3W FM receiver speaker(Mono):With squelch, that is, keep quiet when the radio is not received, and there will be no rustling,Dimensions:200X140X70mm, plastic box.Mains power supply, with volume control knob and frequency adjustment knob, with squelch function, when the radio is received, the audio power circuit is automatically activated, and when the radio stops transmitting, it will automatically disconnect the audio amplifier circuit to keep the receiver quiet and audio output Power 2-3W. The factory default receiving frequency is 88-108MHz.
![](https://img.alicdn.com/imgextra/i4/12672811/TB2r8giXVXXXXXdXXXXXXXXXXXX-12672811.jpg)