1. 2-in-1 audio experience: high-quality speakers + FṂ function, easy to connect to the phone, enjoy music 2. Convenient FM frequency modulation function: automatic search and memory channels, power failure to resume playback, convenient entertainment 3. Colorful LED music lighting effect: 12 LEDs flash with the music, digital display shows mode, volume and frequency 4. Multi-function remote control operation: equipped with a remote control to adjust the volume, mode, channel, DIY assembly fun. Powerful Bluetooth and output: Wireless Bluetooth, USB/SD card playback, high-power output, external speakers are more shocking 5. Working current:recommended. 2A or above; Main functions:Bluetooth 5.0 reception, USB, SD card, FM radio playback, voice call, AUX input Product name:Bluetooth 5.0 speaker with voice-controlled level indicator (split parts) Working voltage:DC5V (can be powered by 5V1.5-2.1AUSB charger) Output power: 2.0 dual-channel 3WX2 Rated power: 5W Frequency response: 4KHz Total harmonic distortion: 3% Signal-to-noise ratio: 3dB Rated impedance: 3Ω Welding method and precautions: The acrylic shell has a protective film. Tear off the protective film before assembly, and figure out the position of each board, then install the speaker and circuit board, and finally assemble. The adjustable resistor for adjusting the sensitivity is welded on the back of the PCB and exposed after the shell is installed, so that the sensitivity can be adjusted at any time. The components should be welded from short to high, and pay attention to distinguishing the positive and negative poles. The polarity of electrolytic capacitors and light-emitting diodes: the long leg is the positive pole and the short leg is the negative pole. After welding, check whether there is a cold solder joint or short circuit, and then power on the test after confirmation. The positive and negative poles of the power supply must not be connected in reverse, otherwise the chip will burn out when the p