fojep K9 Pro Bone Conduction Headphones: The Perfect Audio Companion for Outdoor Activities

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

The fojep K9 Pro are innovative bone conduction headphones perfect for swimming, running, cycling, or any active pursuits. With an IP68 waterproof rating, 32GB of internal storage, long battery life, and crisp audio delivery, these headphones aim to provide unmatched versatility and performance. In this review, we’ll take a close look at the design, features, sound quality, and overall usage to see if the fojep K9 Pro Bone Conduction Swimming Headphones delivers on its promises.

 fojep K9 Pro Bone Conduction Swimming Headphones


The fojep K9 Pro Bone Conduction Swimming Headphones feature an open-ear design with bone conduction technology that sends sound waves directly to the inner ear through vibrations in the cheekbones. This allows you to enjoy music and take calls while staying aware of your surroundings, an important safety feature for sport and outdoor activities. The onboard controls handle play/pause, volume, calls, and voice assistance while the IP68 rating means they can be fully submerged without damage. With up to 7 hours of playtime per charge and a charging case providing 4 extra full charges, battery life is excellent.


  • Innovative bone conduction audio
  • IP68 fully waterproof
  • 32GB internal storage
  • 7 hour battery life, charging case
  • Bluetooth 5.0 connectivity
  • Onboard controls for calls & audio
  • Open-ear design for situational awareness

Weighing just over an ounce, the fojep K9 Pro Bone Conduction Swimming Headphones has an extremely lightweight and comfortable fit. The ear hooks secure the headphones firmly and the fit can accommodate glasses and helmets. For swimming, the open design prevents water blocking sound and allows water to drain freely. The matte black finish gives them a cool, sleek look.

 fojep K9 Pro Bone Conduction Swimming Headphones

Bone Conduction Technology

Unlike traditional headphones, the fojep K9 Pro Bone Conduction Swimming Headphones uses bone conduction to transmit stereo sound as vibrations through your cheekbones to your inner ear. This leaves your ear canals open, allowing you to remain aware of your surroundings - a crucial safety feature for cyclists, runners and hikers. The open-ear design is also more comfortable for long-term wear.

Understanding Bone Conduction Technology

Bone conduction technology bypasses the eardrums, sending vibrations directly to the cochlea through the cheekbones. This method of sound transmission allows the user to stay aware of their surroundings, which is crucial for safety during outdoor activities. Moreover, it avoids ear fatigue and discomfort associated with traditional earbuds, making it ideal for prolonged use in sports and fitness.

 fojep K9 Pro Bone Conduction Swimming Headphones

Sound Quality

With 12mm drivers, the fojep K9 Pro Bone Conduction Swimming Headphones puts out surprisingly powerful and balanced sound with nice depth and bass response thanks to the bone conduction tech. While the open-ear design prevents true noise isolation, you still get immersive audio ideal for sports and safe situational awareness. Call quality is excellent even in noisy environments making them great for calls on the go.

Seamless Bluetooth Connectivity

Equipped with Bluetooth 5.3, the fojep K9 Pro headphones effortlessly pair with your smartphone or tablet for wireless stereo sound. Bluetooth connectivity gives you freedom of movement during workouts or outdoor activities.

Integrated MP3 Player with 32GB Storage

In addition to wireless pairing, the fojep K9 Pro Bone Conduction Swimming Headphones feature 32GB of built-in MP3 storage. This allows you to directly load audio files into the headphones and listen without your phone. With 32GB of space, you can store hundreds of songs right on your headphones.
 fojep K9 Pro Bone Conduction Swimming Headphones


Onboard buttons allow control of volume, tracks, calls, voice assistants and power. The physical controls are thoughtfully placed along the neckband for easy accessibility.

Battery & Charging

The 7 hours of continuous playtime per charge performs as advertised, an impressive number for such compact headphones. The charging case provides 4 full extra charges for exceptional battery life. Charging is quick and convenient with the magnetic contact points and case. Runners, swimmers, and gym goers will appreciate never running out of juice.
 fojep K9 Pro Bone Conduction Swimming Headphones

IP68 Waterproof Rating

With an IP68 rating, the fojep K9 Pro Bone Conduction Swimming Headphones can be submerged in up to 1 meter of water for 30 minutes. This makes them perfect for swimming, allowing you to clearly hear music and podcasts underwater when connected to your smartphone via Bluetooth.

Exploring IP68 Waterproof Rating

The IP68 rating ensures that the fojep K9 Pro can withstand immersion in water up to 1.5 meters deep for up to thirty minutes. This level of protection is not only ideal for swimmers but also for users who might encounter rain or sweat during their outdoor activities, providing a versatile and durable audio solution.

 fojep K9 Pro Bone Conduction Swimming Headphones

Use Cases

The fojep K9 Pro Bone Conduction Swimming Headphones are ideal for:
- Swimming - Fully submergible headphones to motivate you in the pool
- Running & workouts - Lightweight and secure fit for indoor/outdoor exercise
- Cycling & outdoor sports - Situational awareness keeps you safe on the trails or roads
- Travel & commuting - Block out noise on planes, trains and more with great audio
- Phone calls on the go - Noise cancelling mics allow clear calls in any environment

 fojep K9 Pro Bone Conduction Swimming Headphones

Analyzing User Reviews

With over 5,000 global ratings on Amazon, the fojep K9 Pro headphones have won over customers for their impressive sound, smart features and value.

The vast majority of reviews award 4 or 5 stars, praising the crisp stereo sound produced by the unique bone conduction drivers. Users remark on the excellent bass and treble response that brings music to life across genres. The open-ear design draws acclaim for allowing situational awareness while exercising or commuting.

Comfort emerges as another leading theme. Reviewers are pleasantly surprised by how the featherweight 0.6 oz frame rests securely on the cheekbones without bud insertion fatigue. Those with smaller ears especially appreciate the non-invasive fit. Many note wearing them for hours without irritation.

Battery life earns kudos for meeting the advertised 7 hours of continuous playback. Customers are thrilled by the 2-3 day runtime from short top-up charges. Frequent exercisers highlight the convenience of quick charging before workouts.

The IP68 waterproofing makes these headphones a top choice for swimmers. Users report crisp, uninterrupted playback even when fully submerged. The waterproof design instills confidence for those prone to sweating during intense training.

While most reviews are overwhelmingly positive, some users did cite drawbacks. A portion found the on-ear pads inadequate and replaced them with thicker over-ear cushions. Others noted lower volume levels during phone calls. However, reviewers felt these were minor trade-offs for the outstanding sound quality and innovative bone conduction experience.

In summary, buyers praise the fojep K9 Pro Bone Conduction Swimming Headphones as a breakthrough in headphone technology. For an accessible price, they deliver stereo sound in a comfortable, open-ear design perfect for sports and outdoor activity. If the reviews are any indication, these headphones are a slam dunk purchase for active audiophiles.


  • Fully waterproof IP68 rating
  • Crisp immersive audio performance
  • 32GB internal storage
  • Very good battery life
  • Lightweight and comfortable fit
  • Situational awareness for safety


  • Lack of active noise cancelling
  • Not the most stylish design
  • Can’t be worn for side sleeping

Value for Money

With premium features like bone conduction drivers and a waterproof design, the fojep K9 Pro headphones punch well above their budget-friendly price point.
 fojep K9 Pro Bone Conduction Swimming Headphones


With crisp immersive audio, fully waterproof design, onboard storage and excellent battery life, the fojep K9 Pro bone conduction headphones deliver impressive performance and versatility. The open-ear design also allows situational awareness, an important safety feature. For those seeking headphones to motivate exercise, enjoy tunes anywhere, or take calls without isolation, the fojep K9 Pro Bone Conduction Swimming Headphones are easy to recommend.

 fojep K9 Pro Bone Conduction Swimming Headphones


  • Driver: Bone conduction transducer
  • Bluetooth version: 5.3
  • Codecs: AAC, SBC
  • Waterproof rating: IP68
  • Battery life: Up to 7 hours (music), 5 hours (calls)
  • Standby time: Up to 180 hours
  • Charging time: 2 hours
  • Wireless range: Up to 10 meters
  • Onboard storage: 32GB
  • Weight: 0.6 oz (17 grams)

What’s in the Box

The fojep K9 Pro headphones include:

  • K9 Pro bone conduction headphones
  • USB-C charging cable
  • User manual
  • Package of earplugs

How to Use

  1. Charge case and headphones fully before first use
  2. Pair headphones with your phone or device via Bluetooth
  3. Insert headphones with desired eartip size for secure fit
  4. Use onboard controls to play/pause, change volume, answer calls
  5. Clip case to bag or pocket for easy charging on the go
  6. Rinse headphones after use in waterproof

Frequently Asked Questions

Is the fojep K9 Pro suitable for swimming?

Yes, the fojep K9 Pro is IP68 waterproof, making it suitable for swimming in pools and open water.

However, it is important to note that the bone conduction technology used in the K9 Pro may not transmit sound as well underwater as it does in air. This is because sound waves travel differently through water than through air. As a result, you may find that the sound quality is not as good when swimming with the K9 Pro as it is when using traditional headphones.

### Can I use the fojep K9 Pro with my phone?

Yes, the fojep K9 Pro can be paired with any Bluetooth-enabled device, including smartphones, tablets, and laptops. Once paired, you can use the K9 Pro to listen to music, make phone calls, and control audio playback.

The K9 Pro also has a built-in MP3 player with 32GB of storage, so you can listen to music even when you don’t have your phone with you.

### How long does the fojep K9 Pro battery last?

The fojep K9 Pro has a battery life of up to 8 hours on a single charge. This means that you can use it for a full day of listening to music or making phone calls without having to worry about running out of battery.

The K9 Pro also has a quick charge feature, so you can get up to 2 hours of listening time from just a 10-minute charge.

### What are the different wearing styles of the fojep K9 Pro?

The fojep K9 Pro offers three different wearing styles:

  • Bone conduction: This is the default wearing style, and it uses bone conduction technology to transmit sound through your cheekbones to your inner ear. This leaves your ears open, so you can stay aware of your surroundings while you listen to music.
  • Air conduction: This wearing style uses traditional air conduction technology to deliver sound to your ears. This provides a more traditional listening experience, but it can block out your surroundings.
  • In-ear: This wearing style uses earplugs to deliver sound directly to your ear canal. This provides the best sound quality, but it can be uncomfortable for some people.

You can choose the wearing style that best suits your needs and preferences.

### What are the benefits of using bone conduction headphones?

Bone conduction headphones offer several benefits over traditional headphones, including:

  • Open-ear design: Bone conduction headphones leave your ears open, so you can stay aware of your surroundings while you listen to music. This is important for safety when running, cycling, or other activities where you need to be aware of your surroundings.
  • Comfortable: Bone conduction headphones are more comfortable than traditional headphones, especially for people who are prone to ear pain. This is because they do not put any pressure on your ears.
  • Hygienic: Bone conduction headphones are more hygienic than traditional headphones because they do not go into your ear canal. This can help to prevent ear infections.

If you are looking for a comfortable, safe, and hygienic way to listen to music, then bone conduction headphones are a good option.


  • When using the fojep K9 Pro for swimming, make sure to wear the earplugs that are included with the headphones. This will help to prevent water from entering your ear canal.
  • If you are using the K9 Pro for running or other activities where you need to be aware of your surroundings, use the bone conduction wearing style. This will allow you to hear ambient noise while you listen to music.
  • To get the best sound quality from the K9 Pro, make sure that the bone conduction transducers are positioned correctly on your cheekbones. You can adjust the position of the transducers by moving the headband up or down.
  • The K9 Pro comes with a carrying case that makes it easy to transport and store the headphones.