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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-27 · 6 min read · Independent comparison
• Rulefiss Earbuds — biggest strength: True wireless freedom with Bluetooth 5.3, a 48-hour charging case, and IP7-rated sweat and rain protection built for workouts.
• Rulefiss Earbuds — biggest trade-off: They only pair with one device at a time, and they sit in your ears with earhooks rather than over them — despite the "over ear" wording in the listing.
• Anrgterg 12 — biggest strength: Twelve complete wired over-ear headsets in one box, each with a direct USB-C plug and a bendable, kid-proof frame.
• Anrgterg 12 — biggest trade-off: They are wired, one-to-one devices with no battery and no Bluetooth, so they only work with USB-C audio sources.
• Who each pick is for: Rulefiss Earbuds suit one active adult who wants cord-free audio everywhere; Anrgterg 12 suits a teacher, school, library or training center equipping a whole room at once.
The Rulefiss Q38 is a sport-first wireless earbud. Bluetooth 5.3 with a high-sensitivity antenna holds a stable link up to 15 meters, and after the first pairing the buds reconnect automatically the moment you lift them out of the case. That is the kind of small convenience that matters when you are standing on a treadmill or heading out the door with your hands full.
The audio side is built around 13mm graphene moving-coil drivers with AAC/SBC decoding and a 20Hz–20kHz range. Two microphones with CVC 8.0 noise handling are tuned to keep roughly 85% of your voice intact on calls. Battery life runs 6–8 hours per charge, stretched to 48 hours total with the 800mAh case, which refills over USB-C in about 1.5 hours and shows its remaining percentage on a dual LED display. Each bud weighs around 7–8g, the case and kit total 71.8g, and the 45° flexible earhook plus three sizes of silicone tips (S/M/L) is clearly aimed at keeping them locked in during runs.
Buy them if you want one set of buds for workouts, commutes, calls and Siri or Google Assistant voice control, with touch panels that handle volume, tracks and calls. Skip them if you need headphones that cover your ears, if you want to connect a laptop and a phone simultaneously — the listing confirms you cannot — or if you need multiple pairs for several people. Also note the ear placement is listed as over ear with an earhook shape, so read that as a hook that wraps your ear, not a full circumaural cup.
The Anrgterg TPC-12 is not really a personal headphone — it is classroom infrastructure. You get twelve wired over-ear headsets in silver plastic, each with a direct USB Type-C jack and no adapter required. They connect straight to Chromebooks, iPads, tablets, laptops, desktops and smartphones that output USB-C audio, which is exactly the equipment mix most schools and testing centers run.
The design targets abuse. The frame is flexible and bendable, the headband adjusts to fit everyone from kindergarteners to middle schoolers, and each headset weighs only 80g, so kids can wear them through a full lesson without complaining. A 3.9ft cable gives enough slack to shift at a desk, and the surface is easy to wipe down. The listing also pitches them for hospitals, hotels, museums, gyms and exam centers — anywhere you hand out shared audio gear.
Buy them if you are outfitting a group: a class, a language lab, a test hall, a library lending desk. Skip them if you need wireless audio, if your devices only have a 3.5mm jack or plain USB-A, or if you are buying for yourself and only need one headset. There is no battery to charge and no Bluetooth pairing to manage, which is a genuine advantage in a room of thirty students — and a hard limitation the moment you want to walk away from the desk.
• Best for workouts and running → Rulefiss Earbuds. IP7 waterproofing, earhooks and 7g buds are made for sweat and movement.
• Best for a classroom, lab or testing center → Anrgterg 12. Twelve headsets, twelve USB-C plugs, no pairing or charging to manage.
• Best for long listening sessions away from a charger → Rulefiss Earbuds. 6–8 hours per charge, up to 48 hours with the case.
• Best for zero setup friction → Anrgterg 12. Plug the USB-C connector in and audio plays; nothing to pair, nothing to recharge.
• Best for calls and voice assistants → Rulefiss Earbuds. Dual mics with CVC 8.0 and touch controls for Siri and Google Assistant.
• Best for durability around children → Anrgterg 12. Bendable frame, adjustable headband, 80g build and a 2-year warranty description.
• Best for one person who wants everything → Rulefiss Earbuds. Wireless range, a charging case and a full accessory kit in one box.
• Best for sharing audio between two people → Rulefiss Earbuds. Each bud works independently, so you can hand one to a friend.
In my opinion, these are answers to two different questions, so I would not pretend one beats the other outright. If you are an individual buying audio for yourself — gym, commute, calls, travel — I recommend the Rulefiss Earbuds; the wireless freedom, 48-hour case and IP7 rating cover far more of a normal day. If you are buying for a group of students or shared devices, I would take the Anrgterg 12 without hesitation; twelve durable USB-C headsets solve a problem no single pair of earbuds can. Decide which of those two buyers you are, and the choice makes itself. Check the current price on Amazon before you commit.
That figure is not in these data sheets, so I cannot quote it for JBL. What I can tell you factually: the Rulefiss charging case takes about 1.5 hours to refill over USB-C, and the Anrgterg 12 headsets are wired, so they never need charging at all.
How long should over ear headphones last?
The listing describes them as over ear with an earhook shape. In practice they are in-ear buds with a 45° flexible earhook that wraps around your ear for stability — not large cups that sit around your ears. If you specifically want large over ear headphones, the Anrgterg 12 is the true over-ear design here.
Only if the device has a USB Type-C audio output. They are wired with a direct USB-C jack and no adapter, so they connect to USB-C Chromebooks, iPads, tablets, laptops and smartphones — but not to devices with only a 3.5mm jack or no USB-C audio support.
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