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If you want a wired two-way radio earpiece for hands-free talk on a Kenwood-style 2-pin radio, choose KS K-STORM Radio Acoustic Tube; if you need an over-the-ear condenser headset mic for a Shure wireless system or a studio mixer, choose Sabary Ear Back. These two look vaguely similar in a search result — a black earpiece on a thin cable — but they are not the same kind of product at all. One is a surveillance-style radio headset; the other is a performer's microphone. Pick the wrong one and it simply won't plug into anything you own.
• KS K-STORM biggest strength: a complete radio earpiece kit — acoustic tube, mushroom silicone earbud, big glove-friendly PTT, steel swivel clip, and a 2-pin plug built for Kenwood-family radios (Kenwood, Puxing, Wouxun, Baofeng, Retevis).
• KS K-STORM biggest trade-off: it only works with that 2-pin radio family. It is explicitly not for Motorola or Midland radios, and it does nothing for a studio or wireless mic setup.
• Sabary biggest strength: a flexible, lightweight over-the-ear condenser mic with a 4-pin mini XLR (TA4F) connector, a windscreen, and compatibility with a long list of Shure wireless systems and studio mixers — and it fits over glasses, hats or headphones.
• Sabary biggest trade-off: it is Shure-only by design, needs power from the host device, and is a microphone — not an earpiece. It won't help you hear your radio at all.
• Bottom line: KS K-STORM is for security, construction, hospitality, warehouse and event staff on 2-pin radios. Sabary is for DJs, presenters, broadcasters, singers and anyone running a Shure wireless bodypack or a mixer.
The K-STORM KST-370-16K is a classic acoustic-tube surveillance earpiece, and its whole design is about being discreet and hands-free. The silicone earbud is a mushroom shape, which is the style that tends to sit comfortably for long shifts, and the acoustic tube is interchangeable — a practical detail, because the tube is the part that gets chewed up over time and you can swap it rather than the whole headset. The cable is PU, and the spec sheet says it handles 5–10 kg of pull, which tells you it's built for the kind of accidental snagging that happens when you're moving around on a job site or carrying boxes.
The push-to-talk module is the part I'd point a buyer to first. It's oversized, and the sheet specifically notes that operating the key with gloves on is fine. If you've ever fumbled a tiny PTT button with work gloves in the rain, you know why that matters. The steel swivel clip rotates so you can hang it on a shirt placket, a lapel, or a strap without fighting it. Total working length is about 150 cm from plug to earbud, with roughly 94 cm from plug to PTT — enough cable to run the earpiece up under a jacket and keep the button near your chest, which is exactly how these are meant to be worn for a more professional look.
Audio-wise it's a dynamic driver rated 20 Hz to 20,000 Hz, and it's a wired 3.5 mm jack connection with an RF wireless technology listing, which reflects the radio link rather than the headset itself. The plug is the 3.5 mm and 2.5 mm two-pin style used across Kenwood-compatible radios, with an electroplated anti-oxidation coating on the connector. It comes as a two-pack, which is genuinely useful — a spare for a second radio, a partner, or a drawer for when one tube finally gives out.
Who should buy it: security guards, construction crews, waiters, hotel and restaurant staff, warehouse teams, school and event staff, and anyone running Kenwood, Puxing, Wouxun, Baofeng, Retevis or Arcshell radios who wants discreet hands-free comms.
Who should skip it: anyone with a Motorola or Midland radio (it's stated not to work), and anyone looking for a microphone for recording, streaming or a PA system. Also skip if you want wireless freedom — this is a wired headset by design.
The Sabary Ear Back is a different animal entirely: an over-the-ear condenser headset microphone. It's made from rubber and metal, weighs about 27 grams, and the flexible boom is designed so it stays put while you move. One detail I like is that the sheet calls out fit over glasses, hats and headphones — that's a real-world usability point that many headset mics ignore, and it matters if you're presenting with readers on or performing with in-ears.
The connector is the headline spec: a 4-pin mini XLR TA4F plug. That's the standard Shure-style bodypack connector, and the sheet lists compatibility across a wide swath of Shure systems — BLX, SLX, GLX, GLX-D, QLX, QLX-D, ULX, ULXD, UHF-R, PGX, FP, and the older LX1, SC1, U1, UC1, UT1, T1, ULX1, UR1, PG1 and KCX lines. It can also go straight into a studio mixer. The mic ships with windscreens to tame plosives and breath noise, and it's a single unit in the box with a roughly 1.3 m cable.
Two things a buyer must understand before ordering. First, this is Shure-only. The sheet is unusually blunt about it: other brands won't work because the internal wiring may differ. So if you have a Sennheiser, Audio-Technica or generic bodypack, this is the wrong connector. Second, it's a condenser mic that draws power from the host device — your transmitter or mixer has to supply plug-in power, or you'll get nothing. The sound itself is described as clear and stable with low delay, which is what you want for live speech and vocals.
Who should buy it: DJs, presenters, broadcasters, singers, fitness instructors, worship leaders, interviewers, and anyone with a Shure wireless bodypack or a mixer that can feed a condenser mic.
Who should skip it: anyone without a Shure-compatible system or a powered input, and obviously anyone who needs to hear radio traffic. It's a microphone, not a listening device.
• Best for two-way radio comms → KS K-STORM. It plugs into Kenwood-family 2-pin radios and gives you a PTT and earpiece in one kit.
• Best for live voice capture → Sabary Ear Back. It's a condenser mic for Shure wireless systems and mixers.
• Best for gloved, fast PTT use → KS K-STORM. The oversized PTT is designed to be pressed with gloves on.
• Best for wearing with glasses or hats → Sabary Ear Back. Its flexible over-ear design is built to fit around them.
• Best for durability against snags and pulls → KS K-STORM. The PU cable is rated to take 5–10 kg of strain.
• Best for discreet, under-clothing wear → KS K-STORM. The acoustic tube and 150 cm working length are made for concealment.
• Best for connector flexibility → Sabary Ear Back, but only within the Shure ecosystem. Outside it, it won't work.
• Best if you need two units → KS K-STORM, which ships as a two-pack.
In my opinion, most people searching this comparison want the KS K-STORM. If you're on a Kenwood-style 2-pin radio and you need hands-free talk with a PTT you can hit while wearing gloves, the K-STORM is the complete, purpose-built answer, and the two-pack plus interchangeable acoustic tube is a smart, practical package. I'd only steer you to the Sabary Ear Back if you specifically run a Shure wireless system or a powered mixer and need a wearable condenser mic for speaking or singing — in which case the Shure-only, power-required design is exactly what you want, and the K-STORM would be useless to you. Match the connector to your gear first; everything else follows. Either way, check the current price on Amazon before you commit.
No. The manufacturer states it does not work with Motorola or Midland radios. It's built for the Kenwood-family 2-pin standard, covering Kenwood, Puxing, Wouxun, Baofeng, Retevis and Arcshell.
No. It uses a 4-pin mini XLR TA4F connector and is compatible with Shure systems only — the wiring differs on other brands. It also needs the host device to supply power, since it's a condenser microphone.
That's the design intent. The mushroom silicone earbud is made for extended wear, the acoustic tube is interchangeable, and the PU cable is rated to withstand 5–10 kg of pull, so it holds up to everyday handling.
They're not substitutes, so "value" depends on your gear. If you own a 2-pin radio, the K-STORM's two-pack and spare-friendly tube design go further for the money. If you own a Shure bodypack, the Sabary is the only one of the two that will function at all. Check the current price on Amazon for each before deciding.
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