Your shopping cart is empty.

FIFINE Wireless Lavalier/Head-worn Microphone for Plug & Play Setup with Speaker, Camera-K037B

FIFINE Wireless Lavalier/Head-worn Microphone for Plug & Play Setup with Speaker, Camera-K037B

$ 54.99 USD

ūüďĆK037B is currently out of stock, but available for three-week period backorder.

What's Included

  • FIFINE K037B transmitter (back-pack)
  • Lavalier mic & head-worn mic (NO built-in amplifier, external speaker is NECESSARY!)¬†
  • 1/4" output connector receiver¬†
  • 1/4" female to 1/8" male TRS¬†(three black loops) adapter for camera
  • 1/4" female to 1/8" male TRRS (four black loops)¬†adapter¬†for smartphone


Preparation for gig or video filming becomes much easier 

  • Battery-powered system provides the greatest convenience for outdoor use.
  • Even the most generic AA battery(*2) for back-pack transmitter and AAA ones(*2) for receiver can last for 4 hours.
  • System is pre-paired. Just remove from box, plug into camera/digital recorder via the included adapter or hook up directly with PA speaker, amplifier, mixer (any device that allows 1/4" input) for live event.¬†
  • For web conferencing through¬†smartphone or¬†computer, please see a better suited model FIFINE K031B.¬†¬†

Versatility cannot be beat

  • Light-weight head-worn mic fits firmly, making it possible to get quality sound for Yoga¬†tutorial and even high intensity aerobics;
  • Clip-on mic is ideal for presentation, YouTube video.¬†Audience will not notice the¬†hidden mic under your clothing but will be impressed by its clear sound!
  • In-born¬†high sensitivity¬†ensures¬†good clarity. Using less gain of speaker, camera, or phone provides more natural sound.¬†Break free from carrying around a bulky DSLR pre-amp or raising speaker volume to distortion level.
  • Cardioid pattern does an excellent job of reducing noise, especially¬†background sound.¬†Let audience hear you with¬†good clarity!

Great features for outdoor use

  • Easy-to-read transmitter LCD display shows battery life and current frequency channel.¬†
  • Receiver¬†indicator conveys info¬†of power and wireless connection (solid red - paired; blinking green- power runs low and failed to pair).¬†
  • Both features enable your quick response for changing fresh battery or new frequency, to eliminate cutout or dropout.
  • UHF (Ultra High Frequency) is¬†more penetrable and powerful, therefore a better choice for using in built-up areas.¬†The wireless range is¬†45-60 feet¬†even in the face of obstacles.¬†
  • 20 frequency channels ensure conflict-free performance in less than perfect environment.¬†

What's the point of 20 channel

  1. When experiencing interference, click the button on top of transmitter to find the best-suited channel. 
  2. Multiple sets of K037B can be utilized concurrently for a large group interview (will need multiple input jacks on spaker or mixer to plug in receivers). 


Frequency Band UHF 565-584MHz
Type Condenser
Polar Pattern Cardioid 
Frequency Response 50-16kHz
Power Supply

Transmitter: 2 AA Batteries  

Receiver: 2 AAA Batteries

Output Connection 1/4" TS connector (1/4" to 1/8" TRS adapter)


*For self troubleshoot and tutorial video, check out more at K037B technical support page. 

*For more info about technical aspects or email support, feel free to click this link contact us. 

1. Order Information

Q: What if I want to cancel the order right after payment?

A: Please Contact Us immediately if you would like to make changes to your order.


2. Shipping Policy

Q: Do you have international shipping?

A: Sorry, no. Products on FIFINE website are not available for global shipping. Delivery covers UK and US (50 states only and APO/FPO address is not included). For customers who live outside US, you can check out on FIFINE AliExpress Store. 


Q: When will my order ship?

A: We process your order as soon as we receive it. And because of current situation, the processing time could take up to ONE business day, which is not added up to the shipping time. 


Q: What if I provide the wrong/I want to change the shipping address?


If you find out the incorrect before receiving the delivery notification. Please message us as soon as possible so that we can correct the address or cancel the order. We are available at email: or Facebook messenger: 

If the package has already been shipped, we will message you with the carrier info as soon as possible. Then you can contact them to relocate a correct address. If it can not be changed, we have to wait till the package being sent back to proceed a refund. And if it is not returned to sender successfully, we have no responsibility for issuing a refund or replacing the package.   


Q: When can I expect my package to arrive?

A: 1. If it is a pre-order or back-order that is in stock, your package will be shipped first. 

2. Delivery takes 7-10 business days (based on your location), which counts from the day when your order is processed. 

3. If it is urgent order that needs to be delivered in specific date, please Contact Us before placing the order.  


Q: When will I receive my shipment tracking number?

A: You will receive a notification email about the tracking information once your order leaves warehouse that is close to your location.  


Q: What if tracking info indicates the package was receiver but I haven't actually receive it?


First off, please wait for one more business days, tracking info update could be ahead of the actual delivery. 

Next, if you still haven't received package, please call and email the local post office. They will have more info than we can see online. 

At last, when post office is not able to help find the package, you should send us the screenshots of communication with post office as evidence for us to file a complaint.

In such successful delivery case, full refund is not availble. With a response from Post Office through your contact, confirming that package is missing, we  do a refund on the product price. 


3. Return Policy

Q: What is your return policy?

A: FIFINE MICROPHONE offers Free Return within 7 days, counting from the date when the tracking info shows delivered.  

But it does not cover bulk purchase (more than three), intact item, item ordered by mistake. If you wish to return a product, please contact us. 

Notice: Return of product with box opened (not defective), we will charge a 30% restocking & handling fee. 


Q: How do I request a return?

A: Below are the procedures to return a product

1. Send us an email with your order number and the reason for return (Any product shipped to us without a return authorization will be returned to the customer at his or her expense).

2. We will email you back to confirm the product condition. Custoemr will have responsiblity to help provide the info (pictures and recording) we required. Then we will give instructions for returning and a return number.

3. Ship your unused product, in its original packaging, to the address identified in our email.

4. Note: Return shipping fee is covered by FIFINE only if returns are for defective products, products that were not described accurately, or incorrect orders. Whether a product is defective depends the info that customer provides (pictures and recording). 


Return Terms

  • Please be sure to use the original box, and the shipping carton and its packing material to ship the item back (the item is returned in the same condition as it was when shipped).
  • Any product shipped to us without a return authorization will be returned to the customer at his or her expense.
  • You are responsible for shipping the products back to us.If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don‚Äôt guarantee that we will receive your returned item.¬†


4. Refund Policy

Q: After I have returned a product, when will I see the refund in my account?

A: After receiving and examining your returned product(s), your refund will appear in your account within 5 to 7 business days. Please be aware that the refund will depend on the policies of PayPal that was used for payment.


5. Other Terms And conditions


Once package has been shipped out, order cancellation is not possible. When product arrives, buyers are responsible for arranging return shipping by themselves and emailing us back with tracking number. If buyer decides to refuse package instead, we will charge a restocking fee of 30% of the order total. 

Notice: Refund of "refuse-to-receive" item does not cover the origianl shipping fee, That means in this case, we will send back the payment of only the product listed price. 

"Bulk Purchase Return"

If buyer bought more than THREE products at a time, any one of them is defective, we will provide the free replacement.

But if buyer decides to return them all, we will charge a restocking fee of 50% of the order total. And buyer is responsible for the shipment back to FIFINE local factory. 

"Intact Items"

An intact item is one that its package has been opened and it works without a problem. If you want to return an intact product, the return shipping cost shall be covered on customer side. We will deduct the original shipping fee and charge a 30% restocking fee of the product listed price from the refund total.       

"Defective Items"

A defective item is one that is inoperable but has no apparent damage. If you receive a defective product, please contact our email for assistance.

Notice: Whether a product is defective depends the info that customer provides (pictures and recording). 

"Damaged Items"

If the order arrives at you with obvious shipping damage, please refuse the delivery and email us with your order number. If you have accepted it, please save all packaging material and paperwork for the order and also email us for instructions. If you dispose of packaging material, you jeopardize our chances of making a claim, and you may not receive the return.

"Limits of Responsibility"

We take no responsibility for user-initiated damage and/or loss of parts incurred during operation or use of the product. Though you still can email us for assistance on repairing or replacing components.

"Price and/or Description Changes"

All prices, pictures, and descriptions on this website are subject to change. We maintain no responsibility for inadvertent errors. When you place your order with us, you agree to the price and terms indicated on this website. Price differences related to future or past prices in FIFINE MICROPHONE store are not refundable.

Notice: We are sorry that the price fluctation during pandemic is not refundable or we will ask for cover.

"Errors on FIFINE MICROPHONE website"

Prices and availability of products are also subject to change without notice. Errors will be corrected where and when discovered. We reserve the right to revoke any stated offer, cancel orders, and to correct any errors, inaccuracies or omissions in any stated offer or price, including after an order has been submitted and whether or not the order has been confirmed and your payment processed. If your payment has already been processed for the purchase when your order is canceled, we will issue an immediate refund.

"For product FAQs, please turn to the Technical Support Page"

Customer Reviews

Based on 42 reviews Write a review
Liquid error: Could not find asset snippets/theme-controller.liquid