Btootos C9S Wireless Earbuds - A Feature-Packed Budget Option

Published on July 31, 2023, 11:29 a.m.

The market for wireless earbuds is more crowded than ever, with countless options from both premium and budget brands. With so many choices, it can be hard to find a solid pair that balances quality with affordability. The Btootos C9S Wireless Earbuds aims to offer exactly that - a feature-packed wireless earbud experience at a wallet-friendly price point. In this review, we’ll take an in-depth look at the highlights and downsides of this emerging budget contender.


The Btootos C9S Wireless Earbuds are Bluetooth 5.3 earbuds featuring 14.2mm drivers, an over-ear hook design, onboard controls, IP7 water resistance, and up to 48 hours of total battery life including the charging case. They retail for around $50, putting them squarely in budget territory while still touting specifications that rival some premium options.
 Btootos C9S Wireless Earbuds


  • Bluetooth 5.3 connectivity
  • 14.2mm drivers
  • Up to 8 hours battery life (48 hours with case)
  • IP7 sweat and water resistance
  • Secure over-ear hook design
  • Onboard controls (touch enabled)

Design and Comfort

The Btootos C9S Wireless Earbuds have an understated design with subtle branding and an all-black color scheme. The earbuds themselves are relatively compact, with the over-ear hooks providing a secure fit. Three sizes of silicone eartips are included for getting a personalized seal. While not the most discreet, the earbuds are lightweight and comfortable enough for prolonged use. The charging case is on the larger side but provides handy battery level displays for both the case and earbuds.

 Btootos C9S Wireless Earbuds

Sound Quality

With 14.2mm drivers, audio reproduction is very impressive for the price. The Btootos C9S Wireless Earbuds deliver powerful bass, clear mids, and crisp highs. Depth and immersion are great for music, videos, games and calls.

Microphone Quality

Dual microphones utilize noise reduction technology for clear voice pickup and transmission. Callers report the ability to hear conversations even in noisy environments.

Noise Cancellation

While not actively noise cancelling, the in-ear design combined with a tight seal blocks ambient noise passively. This allows you to focus on your music instead of external sounds.

 Btootos C9S Wireless Earbuds

Battery Life

The sizable battery in each earbud delivers up to 8 hours of continuous playback per charge. The charging case provides an additional 40 hours of power. Quick-charging gives 1 hour of playtime from just 10 minutes of charging.

Features and Controls

Onboard controls on each earbud allow for playback, volume, call management, voice assistant activation, and more. The controls are responsive to touch input. Pairing is a breeze with fast pairing technology, and connectivity is reliable within Bluetooth range. Battery life is a highlight, with up to 8 hours per charge on the earbuds themselves and another 40 hours from the charging case. The IP7 water and sweat resistance also make the Btootos C9S Wireless Earbuds suitable for workouts.


With an IP7 rating, the Btootos C9S Wireless Earbuds can withstand rain, splashes, sweat, and workouts without issue. You don’t need to worry about getting them wet.

 Btootos C9S Wireless Earbuds

Use Cases:

The Btootos C9S Wireless Earbuds are ideal for those looking for an affordable yet well-performing wireless earbud option. The over-ear fit makes them suitable for workouts and active use, while the sound quality exceeds expectations for the price. They can be used for everyday music listening, exercising, taking calls, and more. The water resistance also makes them practical for outdoor activities.

Analyzing User Feedback

Delving into the insights shared by verified purchasers paints a vivid picture of the Btootos C9S earbuds in real-world use.

For fitness buffs and gym rats, the Btootos C9S Wireless Earbuds receive glowing reviews. The flexible earhooks hug the contours of users’ ears to provide a personalized secure fit. Even during intense HIIT workouts and body-drenching spin classes, the earbuds stay planted. Reviewers praise the IP7 waterproofing that allows them to power through sweaty sessions without any moisture-related malfunctions.

Outdoorsy users adore the Btootos C9S Wireless Earbuds for all their adventures. The earbuds pump out tunes during long trail runs and bike rides without falling out. Should adventure-seekers get caught in a downpour, the waterproofing saves the day. The long battery life keeps the music flowing on everything from predawn hikes to sunset jogs.

For those whose daily commute involves public transit, the Btootos C9S Wireless Earbuds are a welcome companion. The combination of in-ear design and noise reduction technology immerses pendulum commuters in their podcasts and playlists, shutting out the din of chatty passengers and squealing subway brakes.

When it comes to call quality, reviewers give rave reviews. The quad-microphone array produces clear, crisp voice pickup even on busy city streets and windy days. Friends and family remark how well the Btootos C9S Wireless Earbuds capture and transmit speech compared to other earbuds.

While some lament the charging case is on the chunky side, most agree the battery trade-off is worth it. For under $50, reviewers feel like they are stealing a star athlete’s earbuds. The Btootos C9S Wireless Earbuds deliver performance that rivals models costing twice as much, cementing them as a value champion.


  • Great value
  • Strong bass-driven sound
  • Long battery life
  • Secure and comfortable fit
  • Easy to operate controls


  • Large charging case
  • Plain design
  • Mediocre noise isolation


With marathon battery life, bold sound, and sport-ready ruggedness, the Btootos C9S Wireless Earbuds punch well above their weight class. At under $50, they deliver performance and features you’d expect from earbuds costing twice as much. For athletes and adventurers, these earbuds are a steal.

 Btootos C9S Wireless Earbuds


For their sub-$50 price point, the Btootos C9S Wireless Earbuds pack an impressive set of features into a compelling overall package. The sound quality is hard to beat at this price, and the wireless connectivity and controls work well. While not the most compact, they deliver on comfort and stability. For budget-focused buyers wanting quality wireless earbuds without breaking the bank, the Btootos C9S Wireless Earbuds are easy to recommend.


  • Driver: 14.2mm dynamic driver units
  • Battery life: Up to 8 hours (earbuds), 40 hours (with charging case)
  • Waterproof rating: IP7
  • Bluetooth version: 5.3
  • Charging case dimensions: 4.02 x 3.74 x 1.54 inches
  • Charging port: USB-C
  • Weight: 0.3 grams (earbuds), unknown (charging case)
  • Warranty: unknown

What’s in the Box

  • Btootos C9S earbuds
  • Charging case
  • USB-C charging cable
  • 3 sizes of eartips
  • User manual

How to Use

  1. Charge the earbuds and case fully before first use.
  2. Remove earbuds from case, they will power on automatically.
  3. On your phone, go to Bluetooth settings to pair with “Btootos C9S”.
  4. Insert earbuds with desired eartips. Twist to fit securely.
  5. Use touch controls to play/pause music, adjust volume, answer calls.
  6. Place earbuds back in charging case when not in use.
Btootos C9S Wireless Earbuds