<p><span style="font-size: 18px;">Features</span></p><p><span style="font-size: 18px;">1. 2-in-1 audio experience: high-quality speakers + F? function, mobile phones easily connected, enjoy music</span></p><p><span style="font-size: 18px;">2. Convenient FM function: automatic search and memory channels, power off to resume playback, convenient entertainment</span></p><p><span style="font-size: 18px;">3. Multi-colour LED music light effects: 12 LEDs flash with music, digital display shows mode, volume and frequency.</span></p><p><span style="font-size: 18px;">4. Multi-function remote control: Equipped with a remote control to adjust the volume, mode and channel, DIY assembly is fun!</span></p><p><span style="font-size: 18px;">5. powerful bluetooth and output: wireless bluetooth, USB/SD card playback, high power output, external speakers more shocking!</span></p><p><span style="font-size: 18px;">&nbsp;</span></p><p><span style="font-size: 18px;">Specification</span></p><p><span style="font-size: 18px;">Product name: Bluetooth 5.0 speaker with voice-activated level indicator (bulk)</span></p><p><span style="font-size: 18px;">Working voltage: DC DC5V (can use 5V1.5-2.1AUSB charger power supply)</span></p><p><span style="font-size: 18px;">Working current: recommended.2A or more</span></p><p><span style="font-size: 18px;">Main functions: Bluetooth 5.0 reception, USB, SD card insertion, FM radio playback, voice calls, AUX input</span></p><p><span style="font-size: 18px;">Output power: 2.0 dual-channel 3WX2</span></p><p><span style="font-size: 18px;">Rated power: 5W</span></p><p><span style="font-size: 18px;">Frequency Response: 4KHz</span></p><p><span style="font-size: 18px;">Total harmonic distortion: 3%</span></p><p><span style="font-size: 18px;">Signal-to-noise ratio: 3dB</span></p><p><span style="font-size: 18px;">Rated impedance: 3Ω</span></p><p><span style="font-size: 18px;">&nbsp;</span></p><p><span style="font-size: 18px;">Description:</span></p><p><span style="font-size: 18px;">Bluetooth name: JQ-BT, open the mobile phone or tablet Bluetooth search and pairing connection can be.</span></p><p><span style="font-size: 18px;">FM radio need to add welding antenna, you can find a suitable wire soldered to the antenna welding point, disc in the chassis to increase the radio sensitivity.</span></p><p><span style="font-size: 18px;">Level indicator consists of four LM358 main control chip 12 LEDs, adjustable sensitivity, you need to weld, welded from the Bluetooth board to take 5V power supply can work.</span></p><p><span style="font-size: 18px;">When there is a music signal LED lights from the middle to the two sides flashing.</span></p><p><span style="font-size: 18px;">&nbsp;</span></p><p><span style="font-size: 18px;">Welding method and precautions:</span></p><p><span style="font-size: 18px;">Acrylic shell has a protective film, tear off the protective film before assembling, and figure out the position of each board, and then install the speaker, circuit board, and finally assembled.</span></p><p><span style="font-size: 18px;">Adjustable resistors for adjusting sensitivity are welded on the back of the PCB and exposed after mounting the shell, so that it is easy to adjust the sensitivity at any time.</span></p><p><span style="font-size: 18px;">Components should be welded from short to high, pay attention to distinguish between positive and negative poles. Electrolytic capacitors, light-emitting diode polarity: long foot is positive, short foot is negative.</span></p><p><span style="font-size: 18px;">Welding is completed to fully check whether there is a false weld or short circuit, to confirm that there is no error and then power on the test.</span></p><p><span style="font-size: 18px;">The positive and negative poles of the power supply must not be reversed, otherwise the chip will be burned once the power is turned on.</span></p><p><span style="font-size: 18px;">&nbsp;</span></p><p><span style="font-size: 18px;">Package includes</span></p><p><span style="font-size: 18px;">1 x Bluetooth speaker loose parts</span></p><p><br/></p>