Silicon Microphone Digital Microphone Pickup Amplifier Board Module DC3V-5V BID

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Product Details
Product Feature:
1. Use of high-quality materials, durable
2. Using high-sensitivity microphone + preamplifier circuit design
3. Compact size and exquisite appearance
4. Easy to use
5. Wide range of applications
Parameters:
Board size: 18mm*15mm
Working voltage: DC3V-5V
Output about 30mw, can directly drive ordinary 32 ohm headphones
R5: amplification adjustment resistor, resistance value can be used 4.7k-100k (chip resistor next to the reserved plug-in pads, if there is no chip resistor or welding technology is not good, you can use plug-in resistor.) The higher the resistance value, the higher the gain
R6: for the microphone sensitivity adjustment resistor, shipping default for high sensitivity (resistance value of 0 ohms), resistance can be selected from 0 ohms -10K between (chip resistor next to the reserved plug-in pads, if there is no chip resistor or welding technology is not good, you can use the plug-in resistor.) , the higher the resistance value, the lower the sensitivity
Package list:
Silicon microphone amplifier module * 1
Payment Method
Shipping Policy
Returns & Refund Policy
Feedback
Payment Method
EBAY Managed Payment.
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your
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, please Make sure it's 100% right.
Payment must be received in 5 business days of auction closing.
Please leave note for your special request (e.g. Colors or Size) in PayPal when you pay the order.
Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched.
Shipping Policy
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 1-3 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.
Returns & Refund Policy
All package need to
wait 30 days
(US only n
eed 7-10 days)
,
Please take care it.Less than 30 days,we can't take a refund
.
If the item is defect when you receive it or you are not satisfied with it, please return it within 14 days for a replacement or money back. But the items must be back in factory condition. Please keep in touch with us and double check the return address before you return it.
If is item is defective in 12 months, you can return it to us. We will send you a new replacement after receiving the defective item.
Feedback
We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you keep in touch with us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns.