? FONENG BL138 – Heavy Bass TWS Sports Earbuds

? Long Standby | Deep Bass Sound | Sweat-Resistant | Built for Action

? Powerful Sound. Non-Stop Energy. True Wireless Freedom.

Meet the FONENG BL138, the perfect blend of powerful sound, long-lasting performance, and sport-ready design. Engineered for music lovers and fitness enthusiasts, these TWS earbuds deliver deep, punchy bass, crystal-clear audio, and a snug fit that stays put—no matter how hard you move.

? Heavy Bass. Clear Highs. Total Immersion.

• ? Dynamic drivers tuned for rich bass and balanced stereo sound

• ? Enjoy your favorite playlists with vibrant audio clarity

• ? Perfect for music, calls, workouts, gaming & video streaming

Feel every beat, groove to every note.

? Sport-Ready Comfort & Secure Fit

• ? Ergonomic in-ear design ensures a secure, comfortable fit

• ? Sweat-resistant – ideal for running, gym, or outdoor workouts

• ? Magnetic charging case for easy storage and portability

Move freely. These earbuds won’t fall out or hold you back.

? Long Standby & Playback Time

• ⏱️ Up to 5–6 hours of playtime on a single charge

• ? Get over 20 hours total with the compact charging case

• ? LED indicator keeps you informed on charging status

Perfect for all-day use, travel, or back-to-back workouts.

? Hands-Free Calling & Easy Controls

• ?️ Built-in mic for HD voice calls and video chats

• ?️ Touch controls to manage music, calls, and voice assistants

• ? Compatible with Siri, Google Assistant, and all Bluetooth-enabled devices

Stay connected without reaching for your phone.

✅ Key Features:

• ? TWS (True Wireless Stereo) for freedom and clarity

• ? Heavy bass sound with clear highs and mids

• ? Long standby & total playtime for uninterrupted listening

• ? Smart touch control for easy use

• ?️ Built-in microphone for calls and voice assistant access

• ?‍♂️ Ergonomic fit for sports and active lifestyles

• ? Bluetooth 5.0 – fast, stable, and energy-efficient connection

• ? Universal compatibility – Android, iOS, tablets, laptops & more

?️ FONENG BL138 – Feel the Bass. Fuel the Move.

Whether you're hitting the gym, jogging outdoors, or just enjoying music on the go, the FONENG BL138 is your perfect wireless partner—long-lasting, great-sounding, and built for active living.

Bluetooth Audio Protocol

HFP,HSP,A2DP,AVRCP,SPP,PBAP,TWS+

Charging port

Type-C

BT distance

≤10M

BT vision

V5.3

BT Technology

JL7023

Feature

Sustainable

Codecs

APT-X

Battery Indicator

LED

Battery box capacity

Built-in lithium battery 3.7V/250mAh

Earphone battery capacity

Built-in lithium battery 3.7V/25mAh

Music time

4-5 hours

Is wireless

Yes

Wireless Type

bluetooth

Control Button

Yes

Game atmosphere light

no light

Cord Length

Wireless

Connectors

TYPE-C

Wireless delay time

less than 30 ms

Waterproof Standard

IPX-4

Volume Control

Yes

Support Memory Card

No

Style

In-ear

Communication

Wireless

Chipset Model

JL7023

Chipset

JL

Bluetooth Standard

Bluetooth v5.3

Active Noise-Cancellation

NO

Use

Mobile Phone, COMPUTER, Dj, Gaming, Sports, Travel

Color

Black/Beige

Product name

BL138 Heavy Bass TWS Earphone

Material

ABS

Place of Origin

Guangdong, China

Private Mold

NO

Function

bluetooth, Microphone, true wireless stereo, Waterproof, Noise Cancelling

Premium Sound, Lasting Comfort 

Enhance your audio experience with the FONENG BL138 Heavy Bass TWS Earphone. With a stable and anti-interference V5.3 BT version, you can enjoy seamless connectivity up to 10 meters away. The 45° oblique in-ear design ensures a comfortable fit that won't fall off, while the composite film copper ring speakers deliver high-quality sound. With easy touch adjustment for song selection and call answering, this product is perfect for sports and everyday use.

● Unparalleled sound quality

● Comfortable and stylish

● Long-lasting performance

● Convenient and stylish

Product Display

Powerful Bass, Long-lasting Performance

Long Standby Time

The Foneng BL138 Heavy Bass TWS Earphones offer a long standby time for uninterrupted listening during sports activities.

Superior Sound Quality

With its superior sound quality and heavy bass, these earbuds provide an immersive audio experience for users.

Stable TWS Technology

The TWS technology ensures a stable and seamless connection between the earphones and your device, allowing for hassle-free music enjoyment.

Immersive Audio Experience

The superior sound quality and heavy bass of these earbuds provide an immersive audio experience for users.

Powerful Bass, Extended Stamina

The FONENG BL138 heavy bass TWS earphone features a stable and anti-interference V5.3 BT version, ensuring a reliable connection with a Bluetooth distance of ≤10M. The 45° oblique in-ear design provides a comfortable fit that will not fall off during sports activities. With touch adjustment, composite film copper ring speakers, and a long music time of 4-5 hours, these earbuds offer high-quality sound and convenient operation for an enhanced listening experience.

◎ Stable and Anti-Interference Audio Transmission

◎ Comfortable and Secure Fit

◎ High-Quality Sound and Easy Control

Application Scenario

Workout

Uninterrupted heavy bass music

Outdoor Activities

Long-lasting comfort and sound

Travel

Reliable long standby time

Gaming

Immersive heavy bass experience

Material Introduction

The FONENG BL138 Heavy Bass TWS Earphones are designed to provide users with a high-quality audio experience, thanks to their use of composite film copper ring speakers that restore the essence of sound. With a stable and anti-interference V5.3 BT version, these earbuds offer easy touch adjustment for controlling music and taking calls, along with a comfortable 45° oblique in-ear design that ensures a secure fit during sports and other activities. Long standby time and a convenient Type-C charging port make these earbuds a reliable and practical choice for everyday use.

FAQ

1

How long is the standby time of the Foneng Bl138 earphones?

The Foneng Bl138 earphones have a long standby time of up to 120 hours, making them perfect for extended use without frequent charging.

2

Can I use the Foneng Bl138 earphones for sports activities?

Yes, the Foneng Bl138 earphones are designed for sports use, with a secure fit and sweat-resistant construction to withstand rigorous workouts.

3

What is the battery life of the Foneng Bl138 earphones?

The Foneng Bl138 earphones provide up to 5 hours of continuous playtime on a single charge, allowing for extended use during workouts or daily activities.

4

Are the Foneng Bl138 earphones compatible with my device?

The Foneng Bl138 earphones are compatible with most Bluetooth-enabled devices, including smartphones, tablets, and music players.

5

Can I use the Foneng Bl138 earphones for hands-free calling?

Yes, the Foneng Bl138 earphones feature a built-in microphone, allowing for hands-free calling and voice assistant access while wearing the earphones.

6

Are the Foneng Bl138 earphones suitable for daily use?

Yes, the Foneng Bl138 earphones are designed for daily use, offering comfortable wear and high-quality sound for listening to music, podcasts, and more throughout the day.