Description
This is the Bose QuietComfort Earbuds, catalog number 888507-0100, the sealed cancelling earbud that sits below the Ultra model in Bose’s current range. The listing publishes a specific water rating, a fit kit with nine combinations, confirmed multipoint and a per-bud battery figure. It does not publish a total figure including the case, which is the one number most earbud listings lead with, and that omission runs the other way from the usual problem.
Who these suit
These are for a commuter or a traveler who wants Bose cancellation in a bud rather than an over-ear, and who is willing to spend time on fit. The box contains the two earbuds, a charging case, a fit kit of three pairs of ear tips in small, medium and large plus three pairs of stability bands numbered one to three, a 12 inch USB-C cable and a safety sheet.
Nine tip and band combinations is a serious provision and it is there for a reason. Active cancellation depends on a sealed cavity to work against, so an earbud that does not seal loses its bass and most of its cancellation at once. The stability band is a separate part from the tip, which means you can adjust retention and seal independently. That is more control than the three-tip standard offered by the Beats Studio Buds and most of the cancelling sets in this catalog.
How they connect
Bluetooth 5.3 is stated, with a range of up to 30 feet. Multipoint is confirmed in Bose’s own bullet, described as connecting to multiple devices at once. That is the feature that changes daily use more than any figure on this sheet, and it is genuinely absent from several competitors at this level.
No codec is named
There is no AAC entry, no aptX and no LDAC anywhere on this record. Where nothing is named, SBC is the only codec that can be assumed, because SBC is the baseline every Bluetooth device supports. Nothing here supports a high resolution or lossless claim, and any codec that did appear would still require your phone to support the same one for it to be used. Most iPhones support neither aptX nor LDAC at all.
The Bose QCE app handles equalization across bass, mid-range and treble, battery checks and connected device management. Wear detection, which pauses playback when a bud leaves the ear, is not mentioned anywhere and should be treated as unconfirmed.
The battery picture, and the number that is missing
Bose rates the earbuds at up to 8.5 hours of listening on a single charge, with a 20 minute charge in the case extending playback by up to 2 hours. Full charge time is listed as 1.5 hours. Eight and a half hours is a strong per-bud figure for a cancelling earbud, better than the 6 hours the Soundcore P30i gives with cancellation running.
What is not published anywhere is how many additional charges the case holds, or what the combined bud-plus-case total comes to. Most listings publish the combined figure and hide the per-bud one; this listing has done the opposite. The number you get is the useful one, but it means you cannot tell how long the set runs away from a power source over a weekend.
One practical consequence is worth spelling out. With no case total published, the only way to plan a long trip is to count charge cycles you cannot count, so the safe assumption is that you get one full 8.5 hour run plus whatever the case holds, and that you should carry the USB-C cable rather than relying on the case alone. The 12 inch cable supplied in the box is short enough that it is worth having a longer one.
Bose also does not publish a second battery figure for cancellation switched off. Active cancellation runs microphones and processing continuously and always costs battery, so 8.5 hours is either the cancellation-on figure or an optimistic ceiling, and the listing does not say which.
Fit, cancellation and the water rating
The listing publishes a nominal frequency range of 20 Hz to 20 kHz, which appears on nearly every consumer earbud and distinguishes nothing. Driver diameter, impedance and sensitivity are all absent. The earpiece shape is described as rounded tips and the controls as customizable taps for track skipping, volume, and pause and play.
Bose publishes no decibel reduction figure for the cancellation, which is preferable to publishing one with no test standard named as several listings in this catalog do. What holds true of any active cancellation is that it removes constant low frequency sound such as engine drone, cabin noise and air conditioning well, and does comparatively little against speech. No earbud makes an open-plan office quiet. A sealed cancelling earbud is also the wrong choice for cycling or running near traffic, because it takes away the information you need to hear a vehicle coming.
The water rating is given as IPX4 in Bose’s own bullet. The attribute block says only “Water Resistant” with no code, so take the specific figure. IPX4 covers splashing from any direction, which means sweat and rain. It is not an immersion rating, so these should not be submerged, worn in a shower or taken swimming, and the listing gives no rating for the case at all. No IP code covers seawater or pressurized water, and ingress protection degrades as seals age.
Other oddities in the record
The manufacturer description field on this listing reads, in full, “Coming soon.” That is a placeholder rather than a description, which means everything factual here comes from the bullet points and the attribute table. The item weight of 2.47 ounces and the dimensions of 1.9 by 2.76 by 1.38 inches are packaged figures rather than the weight of a pair of earbuds. The control fields disagree among themselves, listing touch control, an app control method and a software application controller type, which are three descriptions of overlapping things.
The source category path degrades into reviewer names after “Electronics, Headphones, Earbuds and Accessories,” so the category data on this record carries no weight. First availability is listed as September 2024.
What to compare
Within our own listings, the Bose QuietComfort Ultra Earbuds sit directly above these with spatial audio and a shorter battery figure, and the Bose QuietComfort 45 is the over-ear alternative if a bud is not the shape you want. For a set that publishes its battery in every state, the JBL Tune Flex is the clearest comparison, and the wider wireless earbud listings we track cover the field.
Who should buy them, who should not
Buy these if fit is the problem you keep running into and nine tip and band combinations sound like the answer, if multipoint matters, and if an 8.5 hour per-charge figure suits your day. Skip them if you need to know the total runtime including the case before committing, if you want a named codec, if wear detection is on your list, or if you need anything beyond splash and sweat resistance.
