NEEWER KM20 Wireless Lavalier Microphone System, 2 Transmitters

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Product guide

NEEWER KM20 Wireless Lavalier Microphone System, 2 Transmitters

The NEEWER KM20 is a wireless clip-on lavalier microphone system listed with two transmitters and four USB-C receivers. Its multi-device design and charging case suit mobile recording and streaming, though the claimed transmission distance and battery life are manufacturer figures rather than verified performance.

At a glance

The listing describes two transmitters and four receivers, with claimed support for up to four devices at once.
USB-C receivers are listed for compatible phones, tablets and computers. The title also mentions an OTG adapter.
Transmitters offer five volume levels, mute and a noise-cancelling mode according to the listing.
The manufacturer claims up to four hours per transmitter and up to 10 hours with the charging case.
A receiver is described as allowing access to the phone's USB-C port for charging while connected.

Price

$22.94Save 50%

Reference price: ~~$45.89~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Two transmitters and four receivers offer a flexible kit for multi-device recording setups.
A charging case, storage bag, cable and furry windshields are listed as package contents.
Volume adjustment, mute and noise-cancelling mode are described as onboard controls.

Cons

A USB-C connection means buyers should confirm their device has a suitable port or adapter before purchasing.

Technical specifications

17 specifications

Identity
Brand	NEEWER
Model	Black KM20
Form factor	Lavalier
Color	Black

Connectivity and controls
Wireless connection listed	USB
Connector type	USB Type-C
Special feature	Volume Control
Channels listed	4

Audio
Polar pattern	Omnidirectional
Audio sensitivity	70 db
Frequency response listed	48 KHz

Compatibility and use
Compatible devices	Smartphone, Laptop, Tablet, Personal Computer
Recommended uses	Streaming, Video Conference, Video Recording, Voice Recording

Power and battery
Power configuration	Battery Powered
Battery listing	3 Lithium Polymer batteries required.

Materials and weight
Enclosure material	Plastic
Weight listed	9 ounces

What to know before buying

Listing details to confirm

The claimed 656ft/200m forward and 20m/65ft back transmission distances are stated for different directions and are manufacturer claims. The title mentions an OTG adapter, but the explicit contents list does not name one. Battery-life claims are up to four hours per transmitter and up to 10 hours with the case, not a single-transmitter runtime of 10 hours. Confirm device compatibility and the selected listing's adapter contents.

What’s in the box

Included

2 transmitters
4 receivers
1 charging case
1 USB-A-to-USB-C charging cable
2 furry windshields
1 storage bag

Who is it for?

A good fit for

Mobile video creators using compatible USB-C phones or tablets.
Interviewers or streamers who want two clip-on transmitters and receivers for multiple devices.
Buyers who want a compact kit with a charging case and listed windshields.

Less suited to

People whose recording device requires a connector other than USB-C unless they have a suitable adapter.
Buyers needing independently verified range, audio quality or battery-runtime measurements.

NEEWER KM20 Wireless Lavalier Microphone System, 2 Transmitters · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 72 ratings

5 stars79%79%
4 stars11%11%
3 stars2%2%
2 stars0%0%
1 star8%8%

Aggregate ratings lean positive, with many five-star ratings, but a smaller one-star share indicates that experiences are not uniformly favorable. Without customer comments, the reasons for the ratings are unknown. Treat them as broad sentiment rather than evidence about audio quality, range, compatibility or battery performance.

Frequently asked questions

How many transmitters and receivers are listed?

The product title and feature text describe two transmitters and four receivers. The listing says the system can support four devices simultaneously, but this should not be taken as proof that four cameras or devices can all be monitored at once.

Will the KM20 work with any iPhone?

The listing names several iPhone generations and describes USB-C receivers and an OTG adapter. Check your specific phone's port and whether the selected package includes the needed adapter before buying.

How long does the battery last?

The manufacturer claims up to four hours for a transmitter on a full charge and up to 10 hours with the charging case. These are stated maximums, not guaranteed runtimes.

What is included?

The listed package contents are two transmitters, four receivers, one charging case, one USB-A-to-USB-C charging cable, two furry windshields and one storage bag. The title also mentions an OTG adapter, which is absent from that explicit contents list.