Senso ActivBuds S255B wireless earbuds: Budget-Friendly Sports Earbuds with Killer Battery Life

Published on June 11, 2023, 8:06 p.m.

Looking for a pair of no-fuss wireless earbuds for your workout sessions without breaking the bank? The Senso ActivBuds S255B might be just what you need. Offering impressive battery life and sweatproof design at a budget-friendly price, these wireless earbuds aim to deliver on the essentials for exercise enthusiasts. Let’s take a closer look at what makes these earbuds a compelling option for active lifestyles.
 Senso ActivBuds S255B Wireless Headphones


Hailing from the house of Senso, the Senso ActivBuds S255B Wireless Headphones sport a streamlined design in black and blue colors. Built with Bluetooth 4.1, these lightweight earbuds offer up to 30 feet of wireless range and are compatible with most Bluetooth-enabled devices. The flexible ear hooks provide a secure in-ear fit, while the IPX7 waterproof rating makes them ideal for intense workouts.

 Senso ActivBuds S255B Wireless Headphones


Impressive Battery Life: The Senso ActivBuds S255B Wireless Headphones can deliver up to 8 hours of continuous playback on a single charge. The fast charging case provides an extra 32 hours of battery life, perfect for activities on the go.

Sweatproof Design: With an IPX7 rating, the Senso ActivBuds S255B Wireless Headphones can easily withstand sweat, splashes and rain. You can focus on your workout without worrying about moisture damage.

Ergonomic Ear Hooks: The flexible ear hooks ensure the earbuds stay firmly in place during rigorous activities. This reduces ear fatigue and prevents the earbuds from falling out accidentally.

CVC 6.0 Noise Suppression: The built-in noise suppression tech filters out ambient sounds, allowing you to immerse in clear audio.

Intuitive Controls: Control music, calls and volume right from the earbuds with the easy-access buttons. Voice assistance is also available at the touch of a button.

Wide Compatibility: The Senso ActivBuds S255B Wireless Headphones pair seamlessly with iOS and Android devices that support Bluetooth connectivity. Enjoy wireless freedom across your gadgets.

 Senso ActivBuds S255B Wireless Headphones


Sporting an understated design in black and blue, the Senso ActivBuds S255B Wireless Headphones blend in discreetly once worn. The earbud housing is constructed from smooth plastic with an angular look. A short cable connects the two earpieces.

Flexible silicone ear hooks provide a secure fit. Multiple sizes of ear tips are included for comfort. While the build quality is not luxury-grade, the lightweight design offers portability during activities.

Ease of Use

The Senso ActivBuds S255B Wireless Headphones keep operations straightforward and intuitive. Bluetooth pairing is a breeze - just enable pairing mode and connect to your phone.

Onboard controls let you handle music, calls and volume without reaching for your phone. Simply use the multi-function buttons on each earbud.

The earhooks offer adjustable bending so you can tweak the fit as needed. Overall, the fuss-free experience enables you to focus on your workout.

 Senso ActivBuds S255B Wireless Headphones

Sound Quality

Outfitted with decent quality drivers, the Senso ActivBuds S255B Wireless Headphones deliver surprisingly good audio for the price. The sound signature leans towards strong bass and bright treble.

The emphasis on low-end punch adds a lively energy to workout playlists. Vocals also sound crisp and clear. Just don’t expect audiophile-level refinement.

Noise isolation blocks ambient noise reasonably well, letting you zone in on the music. Make sure to get a tight seal with the ear tips for best results.

Microphone Quality

The built-in mics allow you to take calls on the go with decent clarity. While voice pickup quality is good in quiet settings, background noise can reduce intelligibility. Overall suitable for quick calls, but not ideal for prolonged conversations.

Noise Isolation

With a proper in-ear seal using the right sized ear tips, the Senso ActivBuds S255B Wireless Headphones can passively muffle external noise like traffic, chatter and air conditioning units. This enhances immersion in your music.

But active noise cancellation is not present. So loud ambient sounds will still be audible, although reduced. The noise isolation is effective for exercising in most everyday environments.

Battery Life

Delivering up to 8 hours of playtime on a single charge, the Senso ActivBuds S255B Wireless Headphones are a battery champion in the budget category. The quick charging case provides an extra 32 hours. This adds up to a staggering 40 hours total - plenty even for marathon training blocks.


The Senso ActivBuds S255B Wireless Headphones utilize Bluetooth 4.1 for wireless connectivity. Pairing with smartphones and tablets is quick and reliable. Connectivity range reaches up to 30 feet in open areas. Just remember your source device needs to stay nearby.


Each earbud contains buttons to control playback, volume, calls and voice assistants. Having all key controls onboard lets you manage music and calls without touching your phone. This adds to convenience during activities.

Water Resistance

Thanks to the IPX7 rating, the Senso ActivBuds S255B Wireless Headphones can withstand rain, heavy sweat and splashes with no issues. You don’t need to baby these - feel free to wear them without worry during intense workouts and outdoor excursions. Just don’t submerge them fully in water.

 Senso ActivBuds S255B Wireless Headphones

Use Cases

With their durable sweatproof design and marathon battery life, the Senso ActivBuds S255B Wireless Headphones are perfect for adrenaline junkies and fitness buffs. Clip these lightweight earbuds on before heading out for a run, bike ride or hitting the gym, and power through any workout without skipping a beat.

The flexible ear hooks hold the earbuds firmly in place as you crank up the tempo on the treadmill or sprint to catch new PRs. No need to worry about the earbuds bouncing around or falling out mid-workout. Just focus on pushing your limits, while the Senso ActivBuds S255B Wireless Headphones pump out energizing tunes for the extra motivation.

Thanks to the IPX7 rating, these earbuds can shrug off sweat and rain without issues. So go ahead, give it all you’ve got at that high-intensity CrossFit class or outdoor bootcamp. No matter how hard you go, the Senso ActivBuds S255B Wireless Headphones have got your back.

User Feedback Analysis

The Senso ActivBuds S255B Wireless Headphones receive mostly positive feedback for their value-for-money proposition. Many users praise the long battery life and waterproof durability that make these earbuds well-suited for fitness activities.

However, some customers experienced connectivity issues and build quality problems after a few months of use. This highlights the need for Senso to improve quality control and refine the design for enhanced longevity.

While the sound performance exceeds expectations for the price, audiophiles found the audio quality lacking in clarity and bass. This can be attributed to the budget-friendly drivers.


  • Extremely affordable price
  • IPX7 waterproof and sweatproof
  • Secure and comfortable fit
  • Impressive 8 hour battery life
  • Good sound with noise isolation


  • Mediocre build quality
  • Connectivity issues reported
  • Audio lacks refinement


For just $25, the Senso ActivBuds S255B Wireless Headphones deliver surprising value in key areas like battery life, sweatproofing and sound quality. While premium features like active noise cancellation and wireless charging are clearly missing, the essentials for workout purposes are well covered at an unbeatable price point. For budget-conscious fitness enthusiasts, the Senso ActivBuds S255B Wireless Headphones pack a sweet combo of price and performance.


For its affordable $25 price tag, the Senso ActivBuds S255B Wireless Headphones punches above its weight with long battery life, waterproof design and balanced sound. While the build quality leaves room for improvement, these wireless earbuds deliver where it matters most for workout enthusiasts. For those looking for robust Bluetooth earbuds on a budget, the Senso ActivBuds S255B Wireless Headphones make for a smart choice.


  • Model: Senso ActivBuds S255B
  • Wireless range: Up to 30 feet
  • Battery life: Up to 8 hours (40 hours with case)
  • Waterproof rating: IPX7
  • Bluetooth version: 4.1
  • Charging time: 1.5 hours
  • Noise suppression: CVC 6.0
  • Frequency response: 20-22 KHz
  • Earbud weight: Unknown
  • Audio drivers: Unknown

What’s in the Box

The Senso ActivBuds S255B come packaged with:

  • Earbuds
  • Charging case
  • 3 sets of ear tips (small, medium, large)
  • Short charging cable
  • Cable management clip
  • User manual

How to Use

Using the S255B earbuds is simple:

  1. Charge the earbuds in the case for 1.5 hours before first use.
  2. Turn on the earbuds and enter pairing mode - the LEDs will flash.
  3. On your phone, turn on Bluetooth and select ‘Senso ActivBuds’ to connect.
  4. Insert the earbuds and adjust until they fit comfortably.
  5. Use the touch controls to play/pause, skip tracks, adjust volume and take calls.
  6. After use, place the earbuds back in the charging case to power off and recharge.

With their fuss-free operation and rugged build, the Senso ActivBuds S255B are ready to power you through any active pursuit!

Senso ActivBuds S255B Wireless Headphones