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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-24 · 6 min read · Independent comparison
• Gneinour USB Extension Charging — biggest strength: a 5ft USB-A extension built for JLab earbud charging cases, with 2A quick charge, 480Mbps data transfer and a 56K ohm safety resistor.
• Gneinour USB Extension Charging — biggest trade-off: it is a one-job accessory. If you don't own JLab earbuds, or you need a USB-C cable, it gives you nothing.
• TENNMAK 12X — biggest strength: 12 silicone eartips across three sizes in a hard PP case, with a claimed break strength over 22 lbs, so one box covers several pairs of compatible earbuds.
• TENNMAK 12X — biggest trade-off: it fixes fit and comfort, not charging. It's also locked to specific Tribit, Tiksounds and IAMJOY models.
• Who each pick is for: Gneinour for JLab owners who want a longer, safer charging run; TENNMAK for anyone whose compatible earbuds have worn, lost or uncomfortable tips.
This is a purpose-built cable, and it's honest about that. The Gneinour USB Extension Charging is a 1.5m (5ft) USB Type-A male-to-female extension cord, black PVC, 5 g, part number EX-XCTUSBM01. One end goes into a USB port on a laptop, desktop, wall charger or power bank; the other end takes the short cable that came with your JLab earbuds charging case. That's the whole product, and that simplicity is the point.
What it does best is give you reach without giving up charge speed. Gneinour rates it at 2A maximum output with quick-charge support, and the USB 2.0 interface uses silver-plated connectors rated for data transfer up to 480Mbps (about 60MBps). So it's not just a dumb extender — it can carry a sync connection too. Safety is where the spec sheet gets unusually specific: there's a built-in 56K ohm resistor, plus output short-circuit protection and overcurrent protection. The PVC jacket is described as thickened and anti-folding, and it's rated through more than 20,000 bend cycles.
Who should skip it? Anyone without JLab earbuds. There's no USB-C here, no Lightning, and no universal adapter logic — it's USB-A to USB-A female. If your earbuds charge over USB-C, this isn't your cable. And if you need a tip replacement instead of a cable, it does nothing for you.
TENNMAK 12X: Who It's For
The TENNMAK 12X is a consumable-part product, and that's a compliment. It's a set of replacement silicone eartips — 12 pieces total, which works out to 6 pairs: 2 pairs each in small, medium and large. Everything ships in a hard PP box, which matters more than it sounds like it should. Loose eartips in a drawer get lost; eartips in a little snap case don't.
The material claim is the headline here. TENNMAK describes the silicone as flexible and durable, with a break strength over 22 lbs (10 kg) — a spec you rarely see quoted for eartips, and a fair proxy for how much stretching and pulling they'll survive. The design targets a snug match with the earbud nozzle and, just as importantly, a fit inside the charging case, so you're not fighting the lid closed every time you dock them. Color is black, and the whole box measures roughly 2.16 x 1.77 x 0.63 inches — small enough to live in a bag pocket.
Who should buy it? Owners of the specific models listed: Tribit Wireless Earbuds Flybuds 3SC, Tiksounds Mini U-Air, and IAMJOY Wireless Gaming Earbuds in the U-Air, U-Air4 and DG-1 versions. If your originals have gone missing, torn, or simply never fit your ears in the size that came in the box, having all three sizes on hand in one purchase is the practical fix. Gamers and long-session listeners in particular tend to care about tip fit, because a poor seal changes both comfort and how the low end sounds.
Who should skip it? Anyone whose earbuds aren't on that compatibility list. Silicone tips are not universal — nozzle diameter and stem length vary, and a tip that doesn't seat properly will either fall off or block the charging contacts. Also skip it if your real problem is charging. TENNMAK includes a 90-day warranty after purchase, which is a reasonable cushion for a wear item, but it doesn't turn eartips into a charging solution.
• Best for JLab earbud owners → Gneinour USB Extension Charging. The compatibility list covers the entire JLab Go Air, Epic Air and JBuds Air families.
• Best for replacing or upgrading eartip fit → TENNMAK 12X. Six pairs across S/M/L beats guessing at a single size.
• Best for charging speed and safety specs → Gneinour USB Extension Charging. 2A output, 56K ohm resistor, short-circuit and overcurrent protection.
• Best for data as well as power → Gneinour USB Extension Charging. USB 2.0 at up to 480Mbps, not a charge-only cord.
• Best for durability against repeated handling → TENNMAK 12X. Silicone rated over 22 lbs break strength, stored in a hard PP box.
• Best for long-term flex resistance → Gneinour USB Extension Charging. Rated through more than 20,000 bend cycles with a thickened PVC jacket.
• Best for Tribit, Tiksounds or IAMJOY owners → TENNMAK 12X. Flybuds 3SC, Mini U-Air and the IAMJOY U-Air/U-Air4/DG-1 are the supported models.
• Best if you're not sure which you need → decide by problem, not product. Cable too short means Gneinour; ears uncomfortable or tips missing means TENNMAK.
If I had to pick one, I'd buy the Gneinour USB Extension Charging — but only because I think more people run into the "my charging cable won't reach" problem than the "my eartips are gone" problem, and Gneinour's spec sheet is unusually complete for a cable this simple. In my opinion, the 2A rating, the 56K ohm resistor and the 20,000-bend figure are the details that separate it from a generic extender. That said, this is not a close call in the abstract: if you own Tribit, Tiksounds or IAMJOY earbuds and your tips are worn or missing, the TENNMAK 12X is the only one of the two that actually helps you. Buy for your problem, not for the brand name.
No. It's a USB Type-A male to USB Type-A female extension, designed around JLab earbud charging cases. If your case charges over USB-C, this cable isn't the right fit.
Twelve pieces, which is 6 pairs: 2 pairs each in small, medium and large, packed in a hard PP box. That's enough to fit several pairs of compatible earbuds or keep spares on hand.
Not at all. Gneinour handles charging and data transfer for JLab earbuds. TENNMAK handles fit and comfort for Tribit, Tiksounds and IAMJOY earbuds. They don't overlap.
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