Bluetooth earbud modules with connectors
Wireless freedom without boundary
2pin / 0.75mm / 0.78mm / MMCX
TRN BT20 Bluetooth earbud modules with connectorsTRN BT20 Bluetooth earbud modules with connectors
For a completely wireless experience!

Bluetooth 5.0 for the fastest, smoothest audio streaming

Bluetooth 5.0 Art
Up to 200%
in signal transfer rate
Bluetooth 4.2
Bluetooth 5.0
Bluetooth 4.2 or below
Playtime: approx. 2 hours
Sound mode: single audio
Bluetooth: 4.2
Transfer rate: up to 1Mbps
Signal strength:
Bluetooth 5.0
Playtime: approx. 6 hours
Sound mode: dual audio
Bluetooth: 5.0
Transfer rate: up to 2Mbps
Signal strength:

Versatility: Detachable Earpieces

TRN BT20 next to laptop

Comfort & Secure

TRN BT20 is ergonomically designed to sit comfortably and secure over the ears.
TRN BT20 in water droplets

Thermoplastic Elastomer Earhooks

Thermoplastic elastomer or TPE is a rigid yet flexible material that ensures proper fit around the ears. It can withstand extreme climatic heat, body sweat, continuous bending, and reshaping.
TRN BT20 Thermoplastic elastomer earhook
Withstand repeat flexing and bending of up to 90°

Premium, Wireless Audio Performance

A dedicated, premium low-noise headphone amplifier provides superior, high-fidelity audio quality with wireless capability.
TRN BT20 explosive scheme
Low-noise signal amplification
TRN BT20 near smartphone

Exceptional Clarity

With Bluetooth 5.0, you'll get noise-free and distortion-free sound in DUAL AUDIO mode.
TRN BT20 with charging cable

All good things come in small packages

TRN BT20 has two built-in 70mAh Li-ion rechargeable batteries for long playtime and long standby time.
Approx. 6 hours playback
Approx. 180 hours standby
* Time varies according to environmental conditions and user habits.

Better By Design

TRN designed the TRN BT20 with your ultimate comfort in mind. They are lightweight, and the ear hooks contour to a close fit. The Bluetooth modules sit low behind your ears for extra comfort and balance.
TRN BT20 in a man's ear
* Photo for illustration purpose only. Earpieces are sold separately.

One-Touch Operation

Be in control of your listening. TRN BT20 provides a simple one-touch remote for a free and easy operation.
TRN BT20 with different connectors
Press and hold the MFB button for 2s
Press once any MFB button
End call
During a call, press once any MFB button for 2s

Japan TELEC Certification

Officially-certified, quality-assured
TRN BT20 is awarded Japan's TELEC certification for its impeccable and reliable quality.
TRN BT20 Japan TELEC Certification


Product name
Product type
Bluetooth earbud modules with connectors
Standby time
Approx. 180 hours
Playback time
Approx. 6 hours
Effective range
Approx. 10 meters
Available colors
Glossy black
Charging voltage
DC 5 volts, 1A
TRN BT20 size
Actual product specifications may vary, and all features, functionality, and other product specifications are subject to change without notice or obligation.


Power On
Press and hold the MFB button for 2 seconds, voice prompt "Power On" and blue LED flashes 3 times.
Power Off
Press and hold the MFB button for 2 seconds, voice prompt "Power Off" and red LED lights up 1 second.
Pairing with phone / Bluetooth devices
Once both left and right earpieces are connected, power off, then press and hold the MFB button for 5 seconds to enter Discovery mode. Discovery mode will be active for 3 minutes. Once paired, voice prompt "beep" with flashing red and blue lights.
Answer call
With an incoming call, press the MFB button on the left and right earpieces. Blue LED flashes once every 10 seconds.
Reject call
Press and hold the MFB button on the left and right earpieces for 2 seconds with an incoming call. Voice prompt "toot".
End call
During a call, press the MFB button on the left or right earpiece. Blue LED flashes once every 5 seconds.
Press the left and right buttons to pause and play.
Siri voice assistant
Press the MFB button for 1 second and release.


Dongguan Zuodu Acoustics Technology Co., Ltd.
5tn Floor, 67 Baisha Road, Humen Town, Dongguan City, Guangdong Province
QQ: 2550039547
Phone: 400-8080-302
Monday to Sunday 8:30 am to 6:00 pm (UTC+8)