K9 Dual Wireless Lavalier Mic Review: Phone Collar Mic Kit Explained

The K9 Dual Wireless Lavalier Microphone (CHAMPKIA) is a two-mic, plug-in collar mic kit for smartphones. Here is what the Amazon.in listing claims, what is unclear, and who it suits.

By Gadget Soch·19 Oct 2026·9 min read

The K9 Dual Wireless Lavalier Microphone sold under the CHAMPKIA brand on Amazon.in is a two-mic clip-on wireless kit that plugs into a smartphone through a small receiver, aimed at people shooting interviews, vlogs, Reels and YouTube videos on a phone. According to the listing, it needs no app or Bluetooth pairing, offers up to 4 hours of use per charge and works up to 66 feet away in open space. In short, it is a simple, budget-style way to get two voices recorded closer to the source than your phone’s built-in mic, as long as you confirm the connector and accept a short warranty.

An important note on sources: we could not find an official manufacturer product page for this kit or an independent, reputable review of it. Everything here is based on the Amazon.in listing captured on 17 October 2026, and every spec is the seller’s claim. This is not a hands-on review, and we make no claims about how it sounds in real use.

The Amazon link in this article points to one specific listing (ASIN B0FYDQK151), titled “K9 Dual Wireless Lavalier Microphone for All Smartphones”, in black, with two lapel mics and a receiver. The “K9” name is used by many different sellers for similar-looking kits, so specs and box contents from other listings may not apply to this one.

At a glance

Good for: beginners and small creators recording two people on a phone, such as interviews, podcasts on a budget, tutorials and Reels
Skip if: you need camera (3.5mm) output, published audio specs, on-device recording, or a warranty longer than a couple of months
What the listing promises: two omnidirectional clip-on mics, plug-and-play receiver, noise reduction chip, 66 ft range, 1.5-hour charging, up to 4 hours of use, pass-through phone charging
Main concerns: no manufacturer spec sheet, the connector type in this exact box is not spelled out clearly, no sample rate or frequency response published, and only a 2-month warranty

K9 key specifications (as listed on Amazon.in)

Wireless Lavalier key specs at a glance — Wireless Lavalier key specifications, summarised from the table in this review.

Item	What the Amazon.in listing says	Why it matters
Mics in the kit	2 lavalier (clip-on) mics plus 1 receiver	Two people can be recorded at once
Pickup pattern	Omnidirectional	Picks up from all sides, so placement is forgiving but room noise also gets in
Connection	Plug-in receiver, no Bluetooth or app	Fast setup, but your phone port must match the receiver
Connector type	Lightning, USB Type-C (technical details)	Check which plug your box contains before ordering
Range	Up to 66 ft in unobstructed space	Enough for most phone shoots, less through walls or crowds
Charging time	About 1.5 hours	Short top-ups between shoots
Working time	Up to 4 hours	Fine for short sessions, limited for long events
Pass-through charging	Receiver can charge the phone during use	Helps on long phone recordings
Noise handling	Built-in noise reduction chip, windproof foam	May help with low-frequency noise and wind
Body and weight	ABS plastic, 150 g listed	Light, though the figure may be for the full package
Warranty	2 months	Much shorter than many audio accessories
Country of origin	China	Listed by the seller

Check the current price of the K9 Dual Wireless Lavalier Microphone on Amazon.in

How a kit like the K9 works

Wireless lavalier kits for phones have three parts: small transmitters with built-in microphones that clip onto clothing, and a receiver that plugs into the phone’s charging port. The receiver acts like a tiny external sound card. Once plugged in, the phone treats it as its microphone, and the transmitters send audio to it wirelessly.

The listing says the K9 needs no Bluetooth and no app. You plug the receiver into the phone, switch on the two mics, and they pair automatically. That makes it easy for first-time users, but it also means there is no app to show battery levels or adjust settings, so everything depends on the hardware itself.

The main benefit over a phone’s built-in mic is distance. A mic clipped about a hand’s width below the chin is far closer to the speaker’s mouth than a phone a few feet away, so voices usually sound clearer and less echoey, and background noise is lower relative to speech. That benefit applies to wireless lavalier mics in general, not something tested on this specific kit.

The one thing to get right: your phone’s port

The listing title says “for All Smartphones” and the description mentions phones and tablets “with both Type C & other ports”. The technical details list both Lightning and USB Type-C as connector types. What the listing does not say clearly is whether the box includes both plugs, a single receiver with an adapter, or one plug type only. The box contents field just says “Mic”.

This matters because the receiver must physically match your phone. Most Android phones and the iPhone 15 and later models use USB-C. Older iPhones, from the iPhone 5 up to the iPhone 14 series, use Lightning. Look carefully at the listing images, read the latest seller description, and if it is still unclear, ask the seller which connector is in the box before you order.

Also check your recording app. Most phone camera apps and popular video apps will use a plugged-in USB-C or Lightning mic, but behaviour can vary by phone and app. Do a short test recording, play it back with headphones and confirm the sound is coming from the clip-on mics rather than the phone’s own mic.

Noise reduction and omnidirectional pickup

According to the listing, the K9 has a built-in noise reduction chip that “reduces low-frequency noise while preserving high-frequency vocals”, plus high-density windproof foam. In plain terms, it aims to cut rumble such as fans, traffic hum and wind, while keeping voices clear. The listing does not say whether noise reduction can be turned off, how strong it is, or publish any frequency response, so there is no way to judge from paper how natural the voice will sound.

The mics are omnidirectional, meaning they pick up sound from all directions. That is the usual choice for clip-on mics because the mic does not have to point exactly at the mouth. The trade-off is that it hears the room too. For the cleanest result, record in a quiet, soft-furnished room, keep fans off and keep the foam windscreens on outdoors.

Battery, charging and range

The listing claims about 1.5 hours to charge and up to 4 hours of working time. Four hours is enough for most short-form shoots, but if you record long classes, events or podcasts, plan breaks to recharge. There is no charging case mentioned, so you will be charging the mics directly.

One genuinely useful claim is pass-through charging: the listing says the receiver can charge your phone while it is in use. Since the receiver occupies the charging port, this is the only way to keep the phone powered during a long recording.

The claimed range is 66 feet in an unobstructed environment. Walls, bodies and other wireless devices reduce real range, so keep the speaker and phone within a few metres for interviews and vlogs, which is how most phone content is shot anyway.

Who should buy the K9 and who should skip it

Who should buy the Wireless Lavalier — Who the Wireless Lavalier suits, summarised from this review.

Buy it if you are starting out with phone videos, need to record two people at once, want a no-app setup and are comfortable working from seller-provided specs.

Skip it if you also want to use the mic with a DSLR or mirrorless camera (the listing mentions only phones and tablets), need verified audio quality, want onboard recording as a backup, or want the peace of mind of a longer warranty.

Alternatives worth comparing

Hollyland Lark M2: a branded wireless lav system with 48kHz/24-bit audio, environmental noise cancellation, separate USB-C, Lightning (MFi-certified) and 3.5mm camera receiver versions, about 10 hours per transmitter charge and up to 300m line-of-sight range, according to Hollyland’s official page
DIGIMORE D-460 Lite: a dual wireless lavalier kit listed by DIGIMORE for Type-C and iPhone, with noise reduction, low latency and real-time monitoring
DIGIMORE D-455 Pro: a wireless mic system with ANC noise reduction, an omnidirectional mic and a claimed 12 hours of battery, listed for DSLR cameras as well as Android and iOS phones
A wired clip-on mic: if you do not need wireless freedom, a wired lav avoids batteries and pairing altogether. Read our BOYA BY-M1 review for an example

For more on building a simple phone or camera video setup with a light, stand and mic, see our YouTube starter kit guide for India.

What to check before you order

Wireless Lavalier buying checklist — What to check before you buy the Wireless Lavalier.

Confirm the listing shows ASIN B0FYDQK151 and the title “K9 Dual Wireless Lavalier Microphone for All Smartphones”
Check whether the box contains a USB-C receiver, a Lightning receiver, both, or an adapter, and match it to your phone
Check that your phone has no thick case blocking the receiver from seating fully in the port
Note the 2-month warranty and keep your invoice and packaging
Charge both mics fully on arrival and do a test recording within the return window shown on the listing

See the K9 Dual Wireless Lavalier Microphone listing on Amazon.in and confirm the connector shown for this listing.

Frequently asked questions

Does the K9 wireless lavalier mic work with iPhone?

The listing names Lightning and USB Type-C as connector types and says it suits all smartphones. iPhone 15 and later use USB-C, while older iPhones use Lightning. Confirm which receiver plug is included before ordering.

Do I need an app or Bluetooth to use the K9?

No. According to the listing, you plug the receiver into your phone and switch on the mics, and they pair automatically.

How long does the K9 battery last?

The listing claims up to 4 hours of working time and about 1.5 hours to charge. This has not been independently tested.

Can I use the K9 with a DSLR camera?

The listing only mentions smartphones and tablets and does not mention a 3.5mm camera output, so do not plan on camera use.

What warranty does the K9 have?

The Amazon.in listing states a 2-month warranty.

Verdict

The K9 Dual Wireless Lavalier Microphone offers a simple idea: two clip-on mics, a plug-in receiver and no app. For beginners recording two people on a phone, that can be a practical step up from the phone’s own mic. The weak points are equally clear: every spec comes from the seller, there is no published audio data, the connector in the box is not spelled out, and the warranty is only 2 months. Buy it with those limits in mind, and test it as soon as it arrives.