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If you want true in-ear isolation with a charging case that keeps you listening for days between top-ups, choose GUANDA TECHNOLOGIES CO., LTD Earbuds; if you need open-ear awareness with a built-in MP3 player that survives full submersion, choose FEICO Bone Conduction Headphones.
• GUANDA TECHNOLOGIES CO., LTD Earbuds — biggest strength: 40 hours of total playback through the charging case, sealed in-ear sound isolation, and the convenience of wireless charging with a dual LED battery display.
• GUANDA TECHNOLOGIES CO., LTD Earbuds — biggest trade-off: In-ear tips physically block your ear canals, which is exactly what you don't want when you need to hear traffic, and the charging case is one more thing to keep topped up.
• FEICO Bone Conduction Headphones — biggest strength: IP68 waterproofing plus a built-in 32GB MP3 player, so you can swim or train with zero phone and zero Bluetooth signal.
• FEICO Bone Conduction Headphones — biggest trade-off: Open-ear bone conduction means no noise isolation at all, and the 10-hour battery is per-charge only — there's no charging case to extend it.
• Who each pick is for: GUANDA for commuters, office workers, gamers and anyone who wants immersive sound plus long battery; FEICO for swimmers, runners, cyclists and drivers who prioritize safety and phone-free playback.
The GUANDA earbuds (model SM300W) are built around one clear idea: put a lot of listening time in your pocket. Each bud delivers up to 6 hours on a single charge, and the case pushes that to a total of 40 hours of playback. The case itself is the interesting part — it supports wireless charging and carries a dual LED digital display so you can see the battery level instead of guessing. That combination is genuinely useful. Drop the case on a wireless pad overnight, glance at the display before you leave, and you're set for days.
Sound-wise, the spec sheet points to 13mm double-layer diaphragm dynamic drivers with a 20Hz–20,000Hz frequency range and 32-ohm impedance—a standard, easy-to-drive configuration. GUANDA describes the tuning as bright treble, strong bass and clear mids, and the in-ear seal is designed to block outside noise while boosting bass response. Dual microphones handle calls, and Bluetooth 5.3 keeps the connection stable with low latency and minimal power draw. If you game, watch video or take a lot of calls, that low-latency Bluetooth is the practical detail that matters most.
Controls are all touch-based, with a hall switch design that auto-connects the moment you open the case after the first pairing. Tap once for play/pause and calls, double tap to skip tracks. You get four pairs of eartips in a pouch, plus a Type-C cable, and the whole thing is ABS plastic in black. It ships with a 1-year warranty.
Who should buy it: commuters, students, remote workers, gym-goers who want music sealed in their ears, and anyone who hates charging things daily. Who should skip it: cyclists and runners who need to hear their surroundings, and swimmers — these are not waterproof.
The FEICO 9000S-PRO is a different animal entirely. It's an open-ear bone conduction headset, which means the drivers sit outside your ear canal and transmit sound through your cheekbones. Your ears stay completely open to ambient sound. That's the whole point: you hear your music and the world around you at the same time. For running, cycling, driving or walking through a city, that's a real safety argument, not a marketing one.
The standout feature is the built-in 32GB MP3 player. It supports MP3, WAV, FLAC and APE files, and it works with no phone and no Bluetooth connection at all. This is where the IP68 waterproof rating becomes meaningful: Bluetooth doesn't transmit underwater, so the company explicitly tells you to switch to MP3 mode before submerging. That makes the FEICO a genuine swimming headset — one of the few audio products that can claim that honestly. It also handles snorkeling and kayaking.
Battery life is 10 hours per charge, and it recharges in about an hour via a magnetic 4-pin connection. Note that there's no charging case — you charge the headband itself. Bluetooth 5.3 gives you roughly 10 meters of range with an integrated microphone for calls, and controls cover media, volume and call handling. The frame is lightweight plastic in blue, and the frequency range matches the GUANDA at 20Hz–20,000Hz with the same 32-ohm impedance, though the driver type is bone conduction rather than dynamic. Warranty is 30 days, which is noticeably shorter than GUANDA's year.
Who should buy it: swimmers, triathletes, outdoor runners, cyclists, drivers, and anyone who wants music without carrying a phone. Who should skip it: anyone who wants deep bass and total noise isolation, or who mostly listens in loud environments like planes and trains where open-ear audio gets drowned out.
• Best for total battery life → GUANDA TECHNOLOGIES CO., LTD Earbuds. 40 hours with the case versus 10 hours per charge with no case backup.
• Best for swimming and water sports → FEICO Bone Conduction Headphones. IP68 waterproofing plus MP3 mode is a combination the GUANDA simply doesn't offer.
• Best for noise isolation and bass → GUANDA TECHNOLOGIES CO., LTD Earbuds. The sealed in-ear design blocks external noise and reinforces low frequencies; FEICO has no noise control at all.
• Best for situational awareness and outdoor safety → FEICO Bone Conduction Headphones. Open-ear design keeps traffic, voices and warning sounds audible.
• Best for phone-free training → FEICO Bone Conduction Headphones. 32GB of onboard storage plays MP3, WAV, FLAC and APE without any connection.
• Best for calls and low-latency video → GUANDA TECHNOLOGIES CO., LTD Earbuds. Dual microphones and Bluetooth 5.3 with minimal latency suit meetings, gaming and streaming.
• Best for charging convenience → GUANDA TECHNOLOGIES CO., LTD Earbuds. Wireless charging plus a dual LED battery display beats hunting for a proprietary cable.
• Best for people who charge rarely and forget about it → GUANDA TECHNOLOGIES CO., LTD Earbuds. Two-hour charge time, then days of use from the case.
In my opinion, most people should buy the GUANDA TECHNOLOGIES CO., LTD Earbuds. The 40-hour total playback, wireless charging, battery display, dual mics and sealed in-ear sound cover the everyday listening most of us actually do — commuting, working, gaming, calls. The FEICO wins decisively for one specific buyer: the swimmer or outdoor athlete who needs IP68 waterproofing and an onboard MP3 player. If that's you, buy the FEICO without hesitation. If it isn't, the GUANDA is the more versatile daily driver. Check the current price on Amazon before deciding, since that's the one variable I can't compare here.
FEICO, clearly. The FEICO carries an IP68 waterproof rating and a built-in 32GB MP3 player for phone-free playback underwater. The GUANDA earbuds are sealed in-ear headphones with no waterproof rating listed, so swimming isn't a use case for them.
They're different rather than simply worse. FEICO's open-ear design leaves your ear canals unobstructed, so you lose bass impact and gain ambient awareness. GUANDA's sealed in-ear fit blocks outside noise and reinforces low frequencies. For loud environments, in-ear wins; for outdoor safety, open-ear wins.
GUANDA lasts longer overall. Each bud runs up to 6 hours, and the charging case extends total playback to 40 hours. FEICO delivers up to 10 hours per charge with no case, recharging in about an hour via magnetic contacts.
Yes. GUANDA uses dual built-in microphones with Bluetooth 5.3, and FEICO has an integrated microphone with Bluetooth 5.3 and roughly 10 meters of range. Note that FEICO's Bluetooth doesn't work underwater — you'd use MP3 mode there.
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