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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Fifine K037B Wireless Microphone System with Headset Lapel Mic for Speaking

Product ID: 753298763

Details

Brand
FIFINE
Colour
black
Compatible devices
Headphone
Connectivity technology
Wireless
Connector type
1/4" TRS
Model name
wireless lapel

🎤Dual mic options: headset & lavalier for versatile use

📡20 UHF frequencies for interference-free clarity

🔋Battery-powered with low-power LCD alerts

E£ 24279

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Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎙️ Elevate your voice, own the room—wireless freedom that means business!

DUAL MIC VERSATILITY - Switch between discreet lavalier and secure headset mics tailored for dynamic presentations or performances.
NOISE REDUCING DESIGN - Metal collar clip and windscreen minimize plosives and breath sounds for polished audio delivery.
PRO GRADE COMPATIBILITY - Works flawlessly with mixers, PA systems, cameras, and smartphones via included adapters.
SEAMLESS WIRELESS FREEDOM - 20 selectable UHF frequencies ensure crystal-clear sound without dropouts up to 65 feet.
EFFORTLESS SETUP MONITORING - Unique paired ID sync and LCD display make connection and power status a breeze.

The Fifine K037B Wireless Microphone System delivers professional-grade audio with 20 UHF frequencies for interference-free transmission up to 65 feet. Featuring both a headset and lavalier mic, it offers versatile options for speakers, performers, and content creators. Easy setup with unique paired ID sync and an LCD display for battery monitoring ensures hassle-free operation. Compatible with mixers, PA systems, cameras, and smartphones via included adapters, this battery-powered system is optimized for presentations, preaching, and recording with noise-reducing accessories for crystal-clear sound.

Specifications

ASIN	B076F5W8Q5
Antenna Location	Publick Speaking / Presentation / Preaching / Recording
Audible Noise	58 Decibels
Audio Sensitivity	95 Decibels
Best Sellers Rank	588,506 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 49,937 in Office Electronics
Box Contents	Headset microphone, Clip-on Lavalier microphone, Body pack Transmitter, Receiver with 1/4'' Plug, Solid metal collar clip, Windscreens, 1/4'' to 1/8'' adapter-cable, 1/4'' to 1/8'' TRS adapter cable, Female 1/4'' to 1/8'' TRS adapter converter cord
Brand Name	FIFINE
Colour	black
Compatible Devices	Headphone, Radio
Connectivity Technology	Wireless
Connector Type	1/4" TRS
Customer Reviews	4.1 4.1 out of 5 stars (3,496)
Enclosure Material	Metal
Frequency Range	0.05 khz 15 khz
Frequency Response	16 KHz
Hardware Platform	Camera, Smartphone
Impedance	1900 Ohms
Item Dimensions	6.8 x 16.2 x 20.2 centimetres
Item Highlight	Wireless Microphone set, Beltpack Transmitter and Receiver,for Teaching, Preaching
Item Type Name	Wireless Microphone System with Headset & Lavalier Lapel Mics,2pcs(receiver and transmitter)
Item Weight	9.9 Ounces
Manufacturer	Fifine
Manufacturer Part Number	ABCD170019
Microphone Form Factor	Lavalier
Model Name	wireless lapel microphone
Model Number	K037B
Number of Batteries	2 AAA batteries required.
Number of Channels	1
Number of Items	1
Number of Packs	1
Polar Pattern	Unidirectional
Power Source	Battery Powered
Signal-to-Noise Ratio	58 dB
Special Feature	Clip, Wireless
UPC	728290254117
Unit Count	1.0 count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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E£ 24279

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to EGYPT.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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