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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

$ 50.99 USD

What's Included

  • FIFINE K037B transmitter (back-pack)
  • Lavalier mic & head-worn mic (NO built-in amplifier, when using for speech or the like external speaker is NECESSARY!
  • 1/4" output connector receiver 
  • 1/4" female to 1/8" male TRS adapter for camera
  • 1/4" female to 1/8" male TRRS 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 take it out of 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, FIFINE K031B is more suited.  

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 worship, presentation, YouTube video, hiding under shirt but still picking up clean sound. 

Let audience hear you with good clarity 

  • In-born high sensitivity ensures good clarity. The less gain you increase, the more natural sound you get.
  • You will break free of carrying around with bulky DSLR pre-amp or raising speaker volume to terribly high level.
  • Cardioid pattern does an excellent job at reducing noise, especially background sound.
  • Audience will not notice the mic but will be impressed by its clear sound!

Great features for outdoor use

  • Easy-to-read transmitter LCD display shows battery life and current frequency channel. 
  • Receiver status light convey info about powering and wireless connection (light flashes or died out). 
  • Both features enable your quick response, 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. Obstacle in 60 feet cannot spoil audio transmission. 
  • 20 selectable frequency channels ensure conflict-free performance in less perfect environment. 

What's the point of 20 channel

  1. When experiencing interference, one click on the top button of transmitter to find the best-suited channel. 
  2. Multiple sets of K037B can be utilized concurrently for large interview (but need multiple input jacks 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)


*If you need product support or tutorial video, check out more at K037B technical support page

*Wanna get more info about tech aspect or get email support, feel free to 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 only US (50 states only and APO/FPO address is not included), Canada and UK. For customers who live outside US, CA and UK, 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, which takes less than 18 hours. At that time, you can email us to cancel the order.


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 4-7 business days (based on your location), which counts from the day when your order is processed. Carriers include DHL, UPS, USPS, LaserShip and Canada Post. Please note that for Alaska or Hawaii address, shipping could go up to 7-14 days.    

3. If it is emergent 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.  


3. Return Policy

Q: What is your return policy?

A: FIFINE MICROPHONE offers Free Returns within 30 days. If you are not completely satisfied with your purchase and wish to return a product, then please contact our email. We will gladly give you the refund 


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 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.



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. 

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. We recommend using a trackable shipping method. 


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.


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

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