TRN BT20S PRO Bluetooth 5.0 Ear Hook With Charging Box Instructions
- June 5, 2024
- TRN
Table of Contents
TRN BT20S PRO Bluetooth 5.0 Ear Hook With Charging Box

Packaging content
Product overview
INSTRUCTIONS
TURN ON
- Bluetooth modules turn on automatically when removed from charging case.
- Long press button for 1 second
Left and right pairing
Both Bluetooth modules enter left and right pairing mode once turned on.
Pairing mode takes no longer than 3 minutes
Left and right connected
After both left and right Bluetooth modules are paired, pairing mode will
follow.
Pairing to device
When both Bluetooth modules are turned off, press and hold button for 5 seconds
to enter pairing mode. Modules shut off auto matically after 3 minutes when not
paired with any device.
Track selection
Press button 2 times for NEXT track. Press button 3 times for PREVIOUS track.
End call
To end call, press button ONCE
Voice assist dialing
During standby mode or playing music, press and hold down button for 1 second,
release to activate voice assist dialing.
TURN OFF
- When both Bluetooth modules are turned on, return to charging case. Long press button on both Bluetooth modules for 3 seconds to turn off.
- When both Bluetooth modules are turned on, return to the charging case. Long press button of one of the modules for 5 seconds to turn off, while the other module will remain on and remain connected to the phone.
- Return both Bluetooth modules to charging case to turn off
Connecting to phone
Search for available Bluetooth device on the phone. Once found, press stated
device to pair.
Unpair from phone
Press and hold button for 10 seconds to unpair from phone
Answer call
To answer call, press button ONCE to answer call
Reject call
Press button TWICE to reject call.
Play and pause
Press again to resume.
Reconnect to last paired device
- Modules will reconnect to the last paired device once turned on.
- Outgoing and incoming call, music playback will resume once reconnected to the last paired device or present within transmittable range
Low battery warning
Earpieces will emit a beep every minute when battery power drops below 3.4V
Auto shut-o
- When not connect to a Bluetooth device for longer than 3 minutes.
- When power drops below 3.1V
Full-charge
Approximately 1.5 hours to full-charge. LED indicates blue
Call toggling
Press button TWICE to toggle between earpiece and phone
Unpair modules from phone
Unpair modules from the phone menu under connected Bluetooth devices
Power indicator with iOS devices
Remaining power of Bluetooth modules can be viewed on devices with the latest
iO
Listen to WeChat or QQ voice message
Within WeChat or QQ app, click on the voice message you wish to hear.
Watching video or gaming
Watch video or play game within the video or gaming app. Audio will transmit
to both Bluetooth modules.
Charging
Battery capacity is 70mAH. Recommended charging current is 60mA ± 10%. LED
indicates red until full-charge.
FUNCTION SOUND
LED STATUS
Specification
- Bluetooth chipset: Qualcomm QCC3020
- Version: 5.0
- Frequency band: 2.4 ~ 2.48 GHz
- Effective range: Approximately 10 meters
- Bluetooth profiles: HFP V1.7;SBC;APTX;HSP V1.2;A2DP V1.3;
- AVRCP V1.6;SPP1.2
- Playtime: Approximately 9 hours
- Charging time: 1.5 hours to full-charge
- Battery capacity: 80 mAh (earbuds)
- Standby time: Approximately 180 hours
- Operation temperature: 0°C ~ 40°C
- Charging voltage: DC 5V (use charger rated 500mA or higher)
- Charging case battery capacity: 700mAh
- Auto shut-off: 3 minutes when not connected to a Bluetooth device
- Microphone type: 3722 (sensitivity -42db ± 3dB)
- Operating temperature: -10~50℃
Note: Taiwan Regulatory Information (NCC)
Low-powered radio frequency (RF) device requirements Article 12: The certified
low-powered RF device qualifies that the company may change frequency,
increase power, features and functions, or make amendments to the original
design without notification. Article 14: Use of low-powered RF device shall
not affect flight safety or interfere with legal communication; it shall be
deactivated immediately and improved upon until no interference is detected.
Low-powered RF device must withstand interference from legitimate
communications, industrial, scientific and medical equipment.
Address: 5th Floor, No. 67, Baisha Road, Humen Town,
Dongguan, Guangdong, China
Email: trnearphone@foxmail.com
Telephone: 400-8080-302
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