FOYCOY C17 Wireless Earbuds Review 8 Hour Buds, 90 Hour Case Claim and Earhook Fit

Description

Who the C17 is aimed at

The FOYCOY C17 is a sealed in-ear true wireless earbud with an over ear hook, built for the gym and the running route rather than the commute. The hook carries the retention load so the ear tip does not have to, which is why this shape survives in training products: a bud held only by canal friction works loose as soon as sweat builds up, while a hooked bud stays where you put it.

FOYCOY sells it on battery. The headline is 90 hours, and unusually the listing then explains exactly how that number is built, including the volume it was measured at. That is more disclosure than almost anything else in this catalog offers, and it is the strongest thing about the page.

Battery: the one listing that states its test volume

FOYCOY publishes a 70mAh cell in each earbud, rated at up to 8 hours of continuous use at 50 to 60 percent volume, with a 600mAh charging case taking the total to approximately 90 hours. Three of those four numbers are more than competitors give, and the volume condition is the rarest of all. Nearly every quoted playtime in this category is a best case figure measured at an unstated level, which is why real use always falls short. Here you know the assumption, and you know that pushing past 60 percent volume will cut into the 8 hours.

Read the two figures separately, as always. Eight hours is a single session. Ninety hours is the total across roughly eleven returns to the case before the case itself needs a cable. The case carries an external digital LED display showing remaining charge, which removes the usual guessing.

Charging is the other strength. FOYCOY gives the case two options, Type-C by cable or wireless on a Qi pad, and states plainly that the pad is not included. Wireless charging at this level is uncommon and it is stated clearly rather than buried, which is worth noting given how often this catalog advertises the feature in a title and never mentions it again.

Connection: Bluetooth 5.3 and nothing about codecs

FOYCOY lists Bluetooth 5.3 with automatic reconnection when the case lid opens. Version 5.3 improves connection stability and power behavior over older revisions and does not raise sound quality on its own. No range figure and no latency figure are published, which matters if you intend to watch video on these.

No Bluetooth audio codec is named anywhere on the listing. SBC, the baseline every Bluetooth device supports, is therefore the only codec you can assume. There is no published evidence of AAC, which is what Apple devices use, and none of aptX or LDAC, which only work when both the phone and the earbuds support the same one. The sound bullet claims a 13mm speaker delivering “well-balanced and exceptional” audio where “every note and beat is crisp and immersive.” None of that is a measurement, no frequency response or sensitivity figure is published, and nothing here supports describing these as high resolution.

Call handling is described as a built-in microphone plus the snug fit filtering noise. There is no microphone count, no noise suppression standard and no ENC or CVC designation, so treat call performance as unpublished. Multipoint pairing, transparency mode and wear detection are not mentioned anywhere either, so assume none are present.

Fit, seal and the water rating that does not agree with itself

Three sizes of ear tip are included alongside elastic, soft ear hooks. On a sealed earbud the tip size is the specification that decides how much bass you hear, because a leaking seal thins the low end regardless of driver size. Three sizes is the standard selection. The hook adds bulk behind the ear, which is the trade for retention, and it competes for space with glasses arms.

The water rating is where the listing contradicts itself. The title and a bullet both claim IPX7. The specification table records the water resistance level as “Water Resistant,” with no code at all. Those are not the same statement. IPX7 would be a genuine immersion rating covering fresh water at roughly one meter for about thirty minutes. “Water Resistant” is a word, not a rating, and could describe anything from a splash to nothing. Until FOYCOY publishes a consistent code, treat the protection as sweat and rain at best and do not submerge these. No IP rating covers seawater or high pressure water in any case, and the sealing degrades as the housing and port covers age.

The shape fields are also wrong. Both Ear Placement and Form Factor read “Over Ear,” which normally means a headphone with cups that surround the ear. This is an in-ear bud with an over ear hook, and the confusion is in the data rather than the product. The 5.3 ounce item weight is the shipping package, not the earbuds.

What the listing does not tell you, and what else to weigh

The specification table lists noise control as “Sound Isolation,” which is accurate: the quietness comes from the tip blocking the canal and there is no active noise cancellation here. The listing does not claim ANC anywhere, which is more honest than several competitors that put the words in a title and then describe only call microphone processing.

Amazon lists the C17 as ranked 6,356th in Electronics and 773rd among earbud and in-ear headphones, with a 4.3 star average across roughly 98 ratings. That is a small sample and the weakest ranking in this part of the catalog, and it first appeared in March 2025, so there is not much of a track record behind it. Worth knowing: FOYCOY sells a second product under the same C17 model name at a different ASIN, and our review of the other FOYCOY C17 wireless earbuds covers a different listing with different published figures. Match the ASIN, not the model code.

Because these seal the ear canal, they reduce awareness of traffic and should be kept to the gym, the treadmill and the trail rather than the road. If you want the same hooked retention with a different specification, the GNMN V7 wireless earbuds and the occiam T19 compete directly, while the JLab JBuds Air Sport comes from a brand with a longer record. The rest of the format sits in our earbud headphone reviews and our true wireless earbud reviews.

Buy it, or skip it

Buy the C17 if you want hooked retention, an 8 hour bud runtime stated at a real volume, a 600mAh case with an LED display, and wireless charging support at a level where it is rarely offered. Skip it if water protection is the deciding factor, because the listing claims IPX7 in the title and drops to an unrated phrase in its own specification table. Skip it too if you need a codec, a range figure, a latency number, or a longer review history than 98 ratings behind a three month old listing.

Additional information