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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a plug-and-play wired USB-C ear bud with an inline volume control and a metal build for everyday listening, choose jechan Ear bud; if you need a detachable-cable in-ear monitor with a 3.5mm mic plug, a swappable cable, and a full accessory kit for gaming, calls and studio-style listening, choose TANGZU Wan'er S.G II.
• jechan Ear bud — biggest strength: USB-C connectivity with a dual-driver setup, metal housing and an inline control for volume, play/pause and calls. You plug it straight into a USB-C phone or laptop with no adapter and no fuss.
• jechan Ear bud — biggest trade-off: The cable is fixed and the connection is USB-C only, so it won't work with 3.5mm jacks, and a damaged cable means the whole ear bud is done.
• TANGZU Wan'er S.G II — biggest strength: A detachable 0.78mm 2-pin cable in silver-plated oxygen-free copper, a 10mm PET dynamic driver, and a 3.5mm plug with an inline single-button mic — plus six pairs of ear tips and a silicone carry case.
• TANGZU Wan'er S.G II — biggest trade-off: It's a 3.5mm analog plug, so USB-C-only phones need an adapter, and the single-button inline mic is more basic than a full control pod.
• Who each pick is for: The jechan is for the person who wants one cable, one port, and a self-contained ear bud they never have to think about. The Wan'er S.G II is for the listener who wants to swap cables, roll ear tips, and treat their IEM as a small collection piece.
The jechan Ear bud is built around one clean idea: a wired USB-C ear bud that just works. The dual-driver configuration is the headline here — a dynamic driver covering a 20Hz to 20,000Hz range, with 32 ohm impedance and 102 dB sensitivity. In practice that impedance and sensitivity combo means it doesn't demand a lot of power to get loud, which is exactly what you want from something you plug into a phone or a laptop headphone jack that happens to be USB-C.
The design details tell you who it's aimed at. The housing is metal, in a dark gray finish, with a round earpiece shape and an in-ear fit. Metal enclosures tend to feel more substantial in the hand than plastic, and they can help with a sense of solidity during commutes or workouts. At 22.68 g it's light enough to forget you're wearing it. The inline control is the practical centerpiece: you get volume adjustment, play/pause and call answering without touching your device, and the mic uses voice noise cancelling with passive noise isolation. There's no battery, no pairing, no charging case — it's wired, so it's always ready.
TANGZU Wan'er S.G II: Who It's For
The TANGZU Wan'er S.G II is a different species of product. This is an in-ear monitor first and a pair of everyday earbuds second, and the spec sheet reads like it. A 10mm PET single dynamic driver handles the audio, tuned for what the manufacturer describes as soft, smooth treble, full midrange vocals and elastic, punchy bass. Impedance is 19 ohm and sensitivity is a very high 113.5 dB, which means it gets loud easily off basically anything — a phone, a laptop, a controller. The frequency response tops out at 20 KHz.
Where it separates from the jechan is the hardware philosophy. The cable is detachable — a 0.78mm 2-pin connection on a silver-plated oxygen-free copper wire, 1.2 m long. That's the single biggest practical difference: if the cable fails, you replace the cable, not the earphones. The 3.5mm version with mic adds a single-button inline microphone, so you can take calls, join meetings and do team voice chat from a phone, PC or laptop. The housing is a glossy translucent emerald green plastic with 3D embossed dragon patterning inspired by Tang Dynasty jade dragon motifs, and the earpiece shape is oval rather than round.
The package is generous: six pairs of silicone ear tips, a cleaning cloth, a silicone carrying case (with its own listed dimensions and weight), and the earphones themselves. The 1-year manufacturer warranty applies. Buy it if you want a lightweight, ergonomic IEM you can wear for long sessions, if you care about tip rolling to dial in fit and isolation, if you game or take a lot of voice calls, or if you simply enjoy gear that looks like a small piece of art. Skip it if you're firmly USB-C-only and don't want to deal with a 3.5mm adapter, or if you want a full multi-button inline control rather than a single button.
Side-by-Side: Which Should You Choose?
• Best for USB-C devices with no adapter → jechan Ear bud. USB Type-C plug, USB Type-C connectivity, wired. Nothing else needed.
• Best for inline control features → jechan Ear bud. Integrated volume control plus play/pause and call answering beats a single-button mic.
• Best for repairability and cable swapping → TANGZU Wan'er S.G II. The detachable 0.78mm 2-pin OFC cable is the deciding factor here.
• Best for fit customization → TANGZU Wan'er S.G II. Six pairs of silicone ear tips let you tune comfort and passive isolation; the jechan ships as a single sealed unit.
• Best for build feel → jechan Ear bud. A metal enclosure in dark gray versus the Wan'er's plastic and silicone construction.
• Best for gaming and long sessions → TANGZU Wan'er S.G II. Lightweight ergonomic oval-shaped shells, high 113.5 dB sensitivity and a mic built for chat.
• Best for a complete starter kit → TANGZU Wan'er S.G II. Ear tips, cleaning cloth, cable organizer and a silicone case in one box.
If I had to pick one, I'd buy the TANGZU Wan'er S.G II. In my opinion, the detachable 2-pin cable, the six pairs of tips, the carry case and the 3.5mm mic plug give it far more room to live in your life — you can repair it, retune its fit, and use it for gaming, calls and music without being locked to one port. The jechan Ear bud is the better choice only if you specifically want a USB-C, metal-bodied, single-cable ear bud with a real inline volume control and no adapters. For most people reading this, the Wan'er is the one I'd recommend.
They solve different problems. The Wan'er gives you a detachable cable, a 3.5mm mic plug and a full accessory set. The jechan gives you USB-C, a metal body and an inline volume control. "Better" depends on which port your devices use and whether you want a replaceable cable.
Do I need an adapter for the TANGZU Wan'er S.G II?
Only if your source is USB-C-only. The Wan'er uses a 3.5mm plug with mic. The jechan Ear bud uses a USB Type-C plug, so it's the one to pick if you have no 3.5mm output at all.
Both are in-ear designs with passive noise cancellation. The Wan'er is described as lightweight and ergonomic with an oval shape, and you get six pairs of ear tips to fine-tune the fit, which usually matters more for long sessions. The jechan uses a round earpiece with a metal housing and fits securely, but you can't change its tips.
The jechan advertises a voice noise cancelling mic with an inline control that handles volume, play/pause and calls. The Wan'er uses a single-button inline mic aimed at calls, meetings and team chat. Both work for voice; the jechan's control set is more complete, while the Wan'er's is simpler.
I don't publish prices here, since they change often. Check the current price on Amazon for both before deciding — the value math shifts depending on what each costs when you buy.
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