White in-ear stem earbuds with a battery readout on the case, a 14.2mm driver in each bud, ENC call mics and an IPX7 nano-coating, on Bluetooth 5.4.
The SP99 is a white in-ear stem earbud with a small LED display on its case. The readout shows how much charge is left in the case and in each bud, so you can tell at a glance whether it needs the cable tonight. Inside each bud sits a 14.2mm driver, linked to your phone over Bluetooth 5.4.
White stems are the classic i12 look, and the SP99 pairs that look with soft silicone tips that seal into the ear. The seal gives the large drivers a firmer bass and blocks more street noise than an open bud would.
The SP99 at a glance:
On paper, the SP99 shares its full spec sheet with the Btootos A90 Pro: the same drivers, the same 36-hour total, the same Bluetooth 5.4 and AAC support. The SP99 is the white take on that recipe.
The case measures about 2.5 × 1.1 × 2 inches and weighs 2.4 ounces, small enough for a coin pocket. For more on finishes that stay clean, the colors guide compares white, black and pastel cases.
| Spec | Value |
|---|---|
| Model | SP99 |
| Fit | In-ear stem buds, soft silicone tips |
| Bluetooth | 5.4 |
| Range | Up to 15m |
| Codecs | AAC and SBC |
| Latency | 60ms |
| Driver | 14.2mm low-distortion composite, one per bud |
| Impedance | 32 ohm |
| Sensitivity | 101dB |
| Call mics | ENC noise reduction |
| Playtime per charge | 6 to 8 hours |
| Total with case | Up to 36 hours |
| Charging | USB-C, about 1 hour |
| Case display | LED battery readout for case and buds |
| Water and dust | IPX7 nano-coating, dustproof |
| Case size | 2.5 × 1.1 × 2in |
| Case weight | 2.4oz |
| Color | White |
| In the box | 2 earbuds, charging case |
| Warranty | 1 year |
Driver size shapes how much bass an earbud can move, and 14.2mm is at the top end for stem earbuds. The SP99 uses one per bud, with a composite diaphragm designed to keep distortion low when the volume goes up.
Codec support decides how the sound travels from your phone. The SP99 handles both of the common ones:
| Codec | Who uses it | What it means |
|---|---|---|
| AAC | iPhone, iPad, Mac | Apple's preferred format, good quality at Bluetooth bitrates |
| SBC | Every Bluetooth device | The universal fallback for Android, laptops and TVs |
The 32-ohm impedance and 101dB sensitivity mean a phone drives the SP99 comfortably, and a 60ms latency keeps video roughly in sync with the picture.
ENC microphones handle the call side. They focus on your voice and filter out wind, traffic and chatter, so the person on the other end hears you rather than the bus.
Days the SP99 suits well:
There's no active noise cancelling. The silicone tips do the quieting passively, which works well for steady street noise and costs no extra battery. The better the tip fits, the quieter the world gets, so a few minutes spent trying sizes pays off in both bass and calm.
Taps on either stem play and pause, handle calls and wake your voice assistant. The full tap map sits on the touch controls cheat card.
The SP99 pairs automatically after the first setup. Open the case, choose the SP99 in your phone's Bluetooth menu, and from then on it reconnects by itself each time the lid opens.
Detailed steps for every device live in the pairing guide. If one side stays silent, the left and right reset relinks the buds.
Battery works out to 6 to 8 hours per charge and up to 36 hours with the case. That covers a normal week of commuting and a few gym sessions between charges. Real hours dip at high volume and on long calls.
Care habits that keep the SP99 at its best:
The charging guide explains what to do if a bud stops filling up.
Because the SP99 shares its specs with the Btootos A90 Pro, the real choice is between that recipe and pairs with more hours or extra features. Here's how the white SP99 compares.
| Spec | SP99 | Btootos A90 Pro | H69 Clear-Lid | BESNOOW I53 |
|---|---|---|---|---|
| Bluetooth | 5.4 | 5.4 | 5.4 | 5.4 |
| Driver | 14.2mm | 14.2mm | 14.2mm | 14.2mm |
| With case | 36h | 36h | 36 to 45h | 48h |
| Water | IPX7 | IPX7 | IPX7 | IPX7 |
| Look | White | Black | Black, clear lid | Rose gold or white |
Go for the SP99 when:
The Btootos A90 Pro is the same recipe in black. The H69 Clear-Lid adds a see-through lid and up to 9 hours per charge, and the BESNOOW I53 stretches to 48 hours.
Confirm three things first:
If you already know you'll wear the buds for long flights or full workdays, the extra hours of the H69 or I53 are worth a look. If you mostly listen in shorter stretches, a commute here, a workout there, the SP99's 36 hours will rarely run dry, and the white finish keeps the classic stem look.
All four pairs sit close together on specs, so the choice often comes down to color and case. Pick the finish you'll enjoy pulling out of your pocket every day, and the rest takes care of itself.
About 6 to 8 hours per charge and up to 36 hours with the case. The case refills over USB-C in about an hour.
Yes. It supports AAC, the codec iPhones prefer, and pairs automatically after the first setup.
It has an IPX7 nano-coating against sweat, rain and dust. Don't swim or shower with it.
No. Its ENC mics clean up your voice on calls, and the silicone tips block outside noise passively.
Two earbuds and the charging case, with the soft silicone tips fitted on the buds.