How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want to refresh a pair of JBL Endurance Race earbuds you already own with soft silicone tips in three sizes, choose Klowcok Ear Tips Replacement; if you need an actual pair of true wireless earbuds with touch controls, an LED battery display and a charging case, choose Generic M25.
• Klowcok Ear Tips Replacement — biggest strength: nine pairs of soft silicone eartips (three each in S, M and L) that are made to fit JBL Endurance Race earbuds, so you can dial in fit and seal without buying new buds.
• Klowcok Ear Tips Replacement — biggest trade-off: it is not a pair of earbuds. No drivers, no battery, no Bluetooth. If your earbuds are dead, tips won't revive them.
• Generic M25 — biggest strength: a complete TWS package — Bluetooth 5.3, touch controls, a 13.4 mm dynamic driver, a 2000 mAh charging case and an LED screen that shows battery and connection status.
• Generic M25 — biggest trade-off: the noise control is passive, not active, and the fit depends entirely on the stock tips in the box, which you cannot swap out for different sizes.
• Who each pick is for: buy Klowcok if you own JBL Endurance Race buds and the fit, seal or hygiene has become the problem. Buy Generic M25 if you need working earbuds, period.
This is a maintenance product, and it's honest about that. Klowcok sells nine pairs of transparent silicone eartips, split three pairs each across small, medium and large, and lists compatibility specifically with the JBL Endurance RACE. That's the whole pitch, and for the right shopper it's a genuinely useful one.
What it does best is solve fit and wear problems. Silicone is described as soft and lightweight, and the tips are washable, which matters more than people admit. Eartips collect earwax, sweat and grime, and a washable silicone tip is far easier to keep clean than a foam one. Because you get three sizes, you can experiment: a lot of people wear the wrong size without realising it, and the correct size usually means a better seal, which in turn means more of the earbud's own passive noise blocking actually works. The sheets also note effective noise blocking, which makes sense — a well-sealed silicone tip is the cheapest acoustic upgrade you can make to an in-ear design. Swapping them is described as easy, and they're meant to fit securely, so you're not fighting them back on after every run.
Who should buy it: anyone who already owns JBL Endurance Race earbuds and has lost tips, torn tips, or simply wants a fresh set in multiple sizes. Also good if you share earbuds with someone whose ears are a different size than yours.
Who should skip it: anyone who doesn't own JBL Endurance Race earbuds. This is a compatibility-specific accessory, and the package explicitly does not include the earbuds themselves. If you're shopping for new headphones, keep reading.
The M25 is the opposite kind of product — a full true wireless earbud set, sold under a generic brand name with model number M25. It's a three-item package (buds plus charging case), built around Bluetooth 5.3 with a stated range of about 33 feet, which is typical for the current generation of wireless chips and generally means a more stable connection than older Bluetooth versions.
The headline feature is the LED display on the case. It shows battery status and connection information, so you can glance down and know roughly where you stand instead of guessing. The case battery is listed at 2000 mAh with an average life of 20 hours, and a charge time of 1.5 hours — so the case is doing the heavy lifting here, topping the buds up between sessions. The buds themselves use a 13.4 mm dynamic driver, which is on the larger side for in-ear headphones and usually translates to fuller low-end than tiny drivers manage. Impedance is 32 ohm, frequency response starts at 20 Hz, sensitivity is 98 dB, and stated latency is 40 ms.
Controls are touch-based: playback, calls and volume, all handled by tapping the earpiece rather than hunting for buttons. Noise control is listed as passive cancellation, which means it relies on the physical seal of the tip in your ear rather than active electronics — worth knowing, because it's a different thing from ANC. The build is plastic, in black, with an ABS plastic case measuring roughly 3.5 by 2.5 by 1.5 inches and weighing 2.5 ounces, while the earbuds themselves are 1.8 ounces. They're described as waterproof against splashes and sweat, which suits workouts and outdoor use, and there's a one-month warranty listed.
Who should buy it: someone who wants working wireless earbuds with a visible battery readout, touch controls and a case that can carry a long day's listening. Good for commutes, gym sessions and casual listening.
Who should skip it: someone who already owns better earbuds and just needs replacement tips, or someone who specifically wants active noise cancellation — this is passive only.
• Best for replacing worn or lost eartips → Klowcok Ear Tips Replacement. Nine pairs, three sizes, washable silicone.
• Best for getting a working pair of earbuds → Generic M25. It's a complete TWS set with a case, not an accessory.
• Best for fit customisation → Klowcok Ear Tips Replacement. S, M and L in the box; the M25 ships with one set of tips.
• Best for battery visibility → Generic M25. The LED display shows battery and connection status directly on the case.
• Best for hands-free control → Generic M25. Touch controls cover playback, calls and volume.
• Best for the gym and sweaty sessions → Generic M25. Splash- and sweat-resistant housing, plus passive isolation from the in-ear seal.
• Best for hygiene and upkeep → Klowcok Ear Tips Replacement. Silicone tips that are explicitly washable and easy to swap.
• Best for a JBL Endurance Race owner with perfectly good earbuds → Klowcok Ear Tips Replacement. You don't need new headphones; you need a better seal.
In my opinion, these two aren't really competitors — they're different jobs. If I already owned JBL Endurance Race earbuds and my problem was fit, seal, or grubby worn-out tips, I'd buy the Klowcok set without hesitating: three sizes and nine pairs is a lot of room to find the right seal, and a proper seal is what makes passive isolation work at all. If I needed earbuds to actually listen with, I'd buy the Generic M25 instead and treat the LED case display and touch controls as the practical wins. My pick for most shoppers reading this page: the Generic M25, because it's a complete product rather than a part. But if you're here because your JBL buds need rescuing, the Klowcok tips are the smarter buy. Either way, check the current price on Amazon before deciding, since that's the one thing that could tip the scale.
how to connect tws earbuds
Take both earbuds out of the charging case and they should power on and enter pairing mode automatically — that's the standard behaviour for TWS (True Wireless Stereo) designs like the M25, which uses Bluetooth 5.3 with a stated range of about 33 feet. Then open your phone's Bluetooth settings and select the earbud entry from the list of available devices. If only one bud connects, put both back in the case, close it, and start again.
how to pair tws earbuds
Pairing is the same one-time step as connecting: remove the buds from the case, let them link to each other, then choose them from your device's Bluetooth menu. Once paired, the M25 should reconnect on its own the next time you take the buds out near that device. If it doesn't, the LED display on the case is your quickest diagnostic — it shows connection information at a glance, so you can tell whether the buds are actually linked.
how to reset tws earbuds
A reset clears the old pairing record so you can start fresh, which is worth doing if one earbud drops out or the buds won't reconnect. The general routine for TWS buds is to put them back in the case, forget the device in your phone's Bluetooth settings, then take them out and pair again from scratch. Because TWS buds link to each other as well as to your phone, clearing both sides is what fixes most one-sided audio problems.
how to tws earbuds
If you mean getting the most out of a TWS setup, the practical answer is: keep the case charged, use touch controls rather than pulling your phone out, and pay attention to fit. The M25's case holds a 2000 mAh battery rated for about 20 hours of average life, with a 1.5-hour charge time, so topping the case up regularly keeps the buds ready. For the Klowcok tips, the equivalent tip is to try all three sizes — S, M and L — because the right seal is what makes passive noise blocking work properly.
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