![](https://img.alicdn.com/imgextra/i3/2200705146569/O1CN01PHCIRh1yOeITzDVcB_!!2200705146569.jpg)
product description:
1. DC 3.7-5V power supply, current requirement is about 1.5A
2. With infrared remote control receiver
3. There is a power indicator, the power indicator is on, and the indicator flashes when working
4. It can read WAV and MP3 songs in U disk, SD, MMC card(If you use a TF card, you need to insert it on the card sleeve.)
5. Support the Bluetooth stick function, you can use the Bluetooth stick to connect to the mobile phone to listen to songs
6. Support previous song, next song, volume adjustment, play/pause function
7. Stereo dual-channel audio output(Comes with 2 3W power amplifiers, can connect 2 4 ohm 3-5W speakers); Suitable for your own DIY small stereo
Product specifications:
Installation hole distance: 75mm wide
Installation opening: width 70 * height 20mm
Overall dimensions: width 85 * height 25 * depth 22m
![](https://img.alicdn.com/imgextra/i2/2200705146569/O1CN01RiziMD1yOeISOjAPx_!!2200705146569.jpg)
Panel function description:
1. Remote control receiver
2. “SD”: SD/MMC jack, plug in SD or MMC card with MP3 songs, it can play automatically(If you use TF card, you need to add a card sleeve)
3. “USB”: U disk socket, plug in a U disk with MP3 songs to play automatically
4. “PREV/VOL-”: long press to decrease the volume; short press in the USB/SD state to be the previous track
5. “PLAY/PAUSE”: Short press to play/pause in the USB/SD state
6. “NEXT/VOL+”: long press the volume up; short press the previous track in the USB/SD state
7. The power indicator light, the power indicator light is on, and the indicator light flashes when working
![](https://img.alicdn.com/imgextra/i2/2200705146569/O1CN01RXOSwj1yOeITzBMbX_!!2200705146569.jpg)
Wiring instructions:(Please connect two full-range speakers with 4Ω3-5W)
1. Connect the red socket GND on the circuit board to the negative pole of the 5V power supply, and connect +5V to the positive pole of the 5V power supply;
2. The white seat L- connects to the left speaker-pole, and L+ connects to the left speaker + pole;
3. The white seat R- connects to the right speaker-pole, and R+ connects to the right speaker + pole;
Note: The working voltage is 3.7-5.0V, the current is about 700 mA when connected to a 4 ohm 3W speaker, and the current is about 1400 mA when connected to two 4 ohm 3W speakers. If the current is not enough, automatic music change or remote control failure will occur.(If you have this problem, please improve your power supply); Excessive voltage will burn the power amplifier IC and the main chip(Be careful not to connect reverse current, do not exceed the limit voltage, and do not use AC power)
![](https://img.alicdn.com/imgextra/i4/2200705146569/O1CN01mfKXA71yOeIUwWcEs_!!2200705146569.jpg)
![](https://img.alicdn.com/imgextra/i2/2200705146569/O1CN01SedzV91yOeIMZD4B2_!!2200705146569.jpg)