If you want a foldable pair of headphones for one child’s everyday listening and meetings, choose ELECDER i45; if you need a classroom-sized set for students taking part in meetings, choose CNSZSLZ 20. The i45 is the more individual, travel-friendly option, while the CNSZSLZ package is built around supplying a group.
ELECDER i45 vs CNSZSLZ 20 at a Glance
• CNSZSLZ 20 strength: A 20-headphone set with mixed colors, adjustable headbands, soft cushions, and reinforced 4-foot cables; trade-off: it has no stated noise-control feature and is less focused on individual portability.
• Choose ELECDER i45 for one child or teen who needs a compact wired headset for schoolwork, travel, and online meetings.
• Choose CNSZSLZ 20 for a classroom, learning space, or household that needs headphones for multiple students at once.
The ELECDER i45 is a single wired, on-ear headphone set with a 3.5 mm jack and a 40 mm dynamic driver. Its listed sound profile emphasizes moderate bass and a clear midrange. For everyday listening and video meetings, that gives it a straightforward role: connect it to a compatible device and use the device’s own controls to adjust volume. The listed frequency range is 20 Hz to 20,000 Hz, though that figure alone does not establish how a headset will sound in every room or on every device.
Its foldable construction and padded ear cushions make the i45 a practical fit for a student carrying headphones between home, school, and travel. The adjustable headband is described as suitable for children over seven or eight and teens, while also accommodating adults. Its listed weight is 0.28 kg. Sound isolation is included, which may help reduce some surrounding noise, but it is not described as active noise cancellation. That distinction matters for meetings: it may help the wearer focus, but it should not be treated as a guarantee that all background sounds will disappear.
The wired connection avoids charging the headphones, but it also means the wearer is tethered to the device. Compatibility depends on a 3.5 mm jack; some newer Apple devices require a separate adapter, which is not included. The i45 has no headphone volume buttons, so volume changes have to be made on the connected phone, computer, or tablet.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-20 · 7 min read · Independent comparison
Who should skip it: Skip the i45 if you need headphones for a whole class, or if having on-headset volume controls is essential.
The CNSZSLZ 20 is a bulk pack of 20 individually packed, mixed-color, wired on-ear headphones. That changes the buying decision: this is less about choosing one personal headset and more about equipping a classroom, library, learning center, computer lab, or similar shared setting. Each headset has a 3.5 mm jack for connection to compatible Chromebooks, laptops, tablets, and computers.
For lessons, online learning, and meetings, the key practical details are the adjustable headband, soft cushions, and reinforced 4-foot cable. These are described as features for everyday classroom use, and the cable length gives a student some room to sit at a desk while remaining connected. The package is intended for kids, teens, and adults. Its 32-ohm impedance and listed 20-hertz frequency-response detail provide technical context, but they do not by themselves tell a buyer how comfortable a particular headset will feel or how clearly it will reproduce speech.
The main trade-off is that the product information lists no noise control. In a busy room, that means buyers should not expect a stated isolation feature to help keep students focused or block nearby sound. The set is wired, too, so it does not offer wireless movement. For a group already using devices with 3.5 mm connections, however, the simple plug-in format can make it easier to distribute headphones without managing individual batteries.
Who should skip it: Skip the CNSZSLZ 20 if you only need one foldable headset for a child to carry between home and school.
• Best for one child’s everyday headset → ELECDER i45. It is a single adjustable, foldable pair rather than a bulk set.
• Best for outfitting a group → CNSZSLZ 20. The package contains 20 individually packed headphones in assorted colors.
• Best for a student who travels with headphones → ELECDER i45. Its foldable design is intended to make carrying and storage easier.
• Best for classroom lessons and testing → CNSZSLZ 20. It is specifically designed as a classroom set, with adjustable headbands and soft cushions.
• Best stated noise-reduction feature → ELECDER i45. It includes sound isolation, while the CNSZSLZ listing says noise control is none.
• Best for a shared room where cable reach matters → CNSZSLZ 20. Its cable is listed as 4 feet and reinforced for everyday classroom use.
• Best for someone who wants on-headset volume buttons → Neither, based on the listed details. The i45 has no volume buttons, and the CNSZSLZ information does not specify them.
• Best kids headset for meetings at home → ELECDER i45 if one student needs a compact personal set. Best gaming headset for meetings in a classroom group → CNSZSLZ 20 if the priority is supplying multiple compatible devices; neither listing identifies a gaming-specific feature.
My Verdict
I would choose the ELECDER i45 for one child’s meetings because its foldable design, adjustable fit, and stated sound isolation make it the more focused personal option. Its 3.5 mm wired connection is simple, and the lack of onboard volume buttons is a manageable limitation when the device is within reach. For a school or learning space that needs 20 headsets, I would choose the CNSZSLZ 20 instead. My recommendation for individual use in meetings is the i45; the CNSZSLZ set makes more sense when the job is equipping a group.
Next, check for a 3.5 mm headphone connection. Both products use that plug, so the device needs a compatible jack or an appropriate adapter. The i45 product details specifically note that some newer Apple devices require an adapter that is not included. For shared school devices, checking the ports ahead of time can prevent a set of wired headphones from being unsuitable for the intended equipment.
Think about where the headphones will be used and stored. The i45 folds, which is useful for a student packing one personal pair into a bag. The CNSZSLZ set instead emphasizes individually packed units and reinforced 4-foot cables for classroom use. Neither listed design is wireless, so both require a connected device during use.
Finally, consider the listening environment. The i45 lists sound isolation, but the CNSZSLZ 20 lists no noise control. If students will be working in a busy space, that difference may matter. Neither product’s listed information establishes microphone availability, so buyers who need students to speak during online meetings should verify that requirement separately rather than assume either headset includes a microphone.
For one child or teen, the i45 is the more portable personal option: it folds, adjusts, and includes stated sound isolation. For a class or group of students, the CNSZSLZ 20 supplies 20 wired headsets with adjustable headbands and soft cushions.
Do either of these headphones have a microphone?
The provided product details do not state that either model includes a microphone. If students need to speak in meetings, check the full product specifications and device setup for microphone support before choosing.
The ELECDER i45 has a foldable design intended to save space and simplify carrying. The CNSZSLZ 20 is a 20-headphone classroom pack, with individually packed units and 4-foot cables; it is aimed more at group distribution than carrying one personal pair.
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