Product features:
1. Using ne5532 or tda138 4-way mono audio mixing board, patch process production
2. Each way audio input has an independent volume potentiometer, SMD adjustable resistor control
3. Can simultaneously input 4 mono audio signal mixed output
5. Suitable for 4-way mono signal input mixed all the way to the output, no attenuation. Such as microphone voice audio signal, etc.
5. Modular design, small size, only 33mm * 25mm

Product parameters:
NE5532 version of the operating voltage: DC 6V-12V
TDA1308 version of the operating voltage: DC 3V-6V
Size: 33mm*25mm
Input channel: 4-channel mono audio input
Output channel: mono mixed output
Output amplification: about 1X
Note: The power supply is recommended to use a linear regulated power supply or battery power to avoid interference cascade. Switching power supply needs to pay attention to the power supply interference problems. Modular design once welded non-returnable and non-exchangeable, please pay attention to the purchase of the fit.

Product List:
1X module

1.We accept PayPal payment ONLY, and must be received within 5 days from the date of purchase.
2. It is easy and safe for you to pay by credit cards, debit cards, bank transfers and PayPal account balances.
3.Buyers are responsible for import duties,custom fees and taxes, if any, please check your country.

1.We only ship to the confirmed address provided by eBay. please make sure your ebay address is 100% matches the address you would like us to ship to. If not, please let us know before we sent you the package, or we will not be responsible for any loss. hope you could understand.
2.Orders will be processed instantly and dispatched within 1-2 business days except hoilday, so we do NOT accept any email/message note after you place orders.
3.All package need to wait 30 days,Please take care it.Less than 30 days,we can't take a refund.

1.We believe our items are so outstanding. We are convinced you will be happy with your Purchase.
2. If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund or resend the item to you after the returned item arrived at our warehouse.
3. Please include your eBay ID and item number with any email requests.
1.We greatly appreciate your POSITIVE feedback. Please do NOT leave negative feedback without asking for help.
2.Please DON'T leave negative or neutral feedback if you haven't received item in 30 days, because we have mentioned the shipping time repeatedly.
1. If you have any questions, please feel free to email our service specialists.
2.Just contact us using the " Ask the seller a question" link on eBay.
3.Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem.


Am 22.05.2023 hat der Verkäufer die folgenden Angaben hinzugefügt:


Am 12.10.2023 hat der Verkäufer die folgenden Angaben hinzugefügt:

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