What are the exact 20 frequencies on these units please. what is the mw output of the transmitters please.?

Frequency is 565 to 584 Power 10db/10MV

I have a sony srs xb20 speaker can i use your system if i use a 1/4 to 3/8 adapter to plug into the Sony unit? if not why not?

No, you can't. Because this receiver output is about the same level as a wired mic. It must be plugged into a 1/4'' speaker input designed for a mic connection. If your speaker has only 3.5mm line inputs which require a higher level signal than a mic provides, the mic will be not suitable to be used with it, even you add an adapter. The sound will be soft and hard to be heard.

Can I plug the receiver into my iPhone, audio mixer, or Mac to record the audio?

Sorry, it works with only audio mixer that has 1/4" mic jack. If you need a mic to use with Mac, we have the K031 (Asin: B074C125TN) USB wireless lav mic. But neither of them will work with iPhone.

can it be used for singing

It will be more suitable for speaking than singing. We would recommend the handheld mic K025(ASIN:B0795PNCBG) or K035(ASIN:B01MT6AAIC) for singing. All these mics need to work with speakers/amps that has 1/4'' mic input.

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Description

🎙️ Elevate your voice, own the room—wireless freedom that keeps you heard!

BUILT TO PERFORM - Metal construction with windscreen and collar clip reduces noise, plosives, and breath sounds for pristine audio clarity.
DUAL MIC VERSATILITY - Includes both a secure headset mic and discreet lavalier for hands-free, professional-grade presentations.
EFFORTLESS SETUP SYNC - Paired ID synchronization makes wireless mic setup as easy as plugging in a wired one—no tech headaches.
PRO GRADE COMPATIBILITY - Works flawlessly with cameras, smartphones, amplifiers, and mixers via included adapters—perfect for creators and pros.
SEAMLESS WIRELESS FREEDOM - 20 selectable UHF frequencies ensure crystal-clear audio without dropouts up to 65 feet.

The FIFINE Wireless Microphone System (K037B) delivers professional-grade audio with 20 UHF frequencies, dual headset and lavalier mics, and easy plug-and-play setup. Designed for teachers, speakers, and content creators, it offers up to 65 feet of interference-free range, battery status monitoring, and broad compatibility with cameras, smartphones, and sound systems. Lightweight and built with metal components, it ensures clear, reliable sound for any public speaking or recording scenario.

Specifications

Special Feature	Wireless
Compatible Devices	Camera, Smartphone, Amplifier
Colour	Black
Included Components	headset microphone and clip-on lavalier microphone body pack transmitter, receiver with 1/4" plug, solid metal collar clip and windscreen, female 1/4" to 1/8" trs adapter converter cord (for camera), 1/4" to 1/8" trrs adapter cable (for smartphone)
Polar Pattern	Unidirectional
Audio Sensitivity	95 dB
Item Weight	9.9 Ounces
Impedance	32 Ohm
Microphone Form Factor	Microphone System
Item dimensions L x W x H	6.8 x 16.2 x 20.2 Centimeters
Power Source	Battery Powered
Number of Batteries	2 AA batteries required.
Material	Metal
Signal-to-Noise Ratio	58 dB
Hardware Platform	Smartphone
Number of Channels	1
Frequency Response	20 KHz
Noise Level	58 dB
Manufacturer	FIFINE
Product Dimensions	6.8 x 16.2 x 20.2 cm; 280.66 g
Batteries	2 AA batteries required.
Item model number	K037B
Number of Strings	4
Item Weight	280 g
Country of Origin	China

Reviews

A**R

Quality product.

Easily connectible. Very handy. Good quality.

9.03.2020

A**D

Really nice

Really nice product

5.03.2020

T**A

Most powerful catching capacit.

Useful device.

1.08.2018

@**R

Upto themark

Wow

26.10.2019

O**?

Disaster

It's not working properly. It works for 1-2 hour after replacing battery and then start blinking green .I replaced it's battery for three times.And Amazon's employee told me that he will process it's return and I should wait till 2nd October for seller's reply.And when I visited the site on 2nd October they didn't processed return.I purchased it with my own money which I earned with lot of struggle and hard workAnd you all Amazon's employees are fooling us.I am very disappoint 😭I only use it for one hour in one day.

26.09.2024

A**M

Both adapters for phone

Both adapters received by me are for phone. Pl replace one of them with the camera one.

17.08.2023

R**N

Failed when needed

I bought this for an inhouse event, and most important day. I tested everything before packed it and kept it for use on the day needed. But on the day it failed to work. It did not sync any more how hard i tried. Such a waste of money and time.

14.10.2024

A**R

Four Stars

Its Fine

28.06.2018

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