TRN Bluetooth 5.0 BT20S

TRN-BT20S Truwireless IEM Universal Adapters

Equipped with Qualcomm's newest high-performance Bluetooth 5.0 chipset, the TRN BT20S delivers a superb listening experience with consistent connection to your device. High-speed transmission, low distortion, and high-quality audio streaming are the reasons why The Listening Stack has chosen the TRN BT20S Truwireless adapters for IEM's as our primary wireless solution. Available in MMCX, Two Pin 0.75mm or 0.78mm connection types, we cover all removable cable IEM options.

Additional Features:

  • One-touch operation
  • Nano waterproof coating
  • Sweat and splash resistant
  • Thermoplastic earhooks for flexibility
  • FPC Bluetooth antenna for robust connectivity
  • DSP-enhanced noise reduction technology
  • 70mAh Li-ion batteries for up to 8 hours of playback time

Tech Specs:

  • Name: TRN BT20S Bluetooth 5.0 Ear Hook
  • Model: BT20S
  • Bluetooth Version: 5.0 4
  • Connection type: 2PIN/MMCX
  • Battery size: 70mAh
  • Play time: About 8 hours
  • Effective Distance: About 10m
  • Charging Time: About 2 hours
  • Charging Port: Micro USB/DC 5V/60mA
  • Volume Control: Yes
  • With Microphone: Yes Applicable earphone:
  • 2pin Sizes: 0,75MM\0.78MM
  • Standard MMCX Adapter size


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After eight great years in our Capitola location, we're moving to Mid-Town! Our new location is in the Seabright neighborhood of Santa Cruz, near the Sutter Health Physical Therapy Center and Lilian's Italian Restaurant. Call us if you would like instructions.

Our New Santa Cruz Location:
The Listening Stack
1535 Seabright Ave. Ste. 100
Santa Cruz, CA 95062
(831) 498-9890

This will be our new address as of August 22, 2022 and is only for our Capitola location. Our Watsonville location is still at 1484 Freedom Blvd. Our phone number is still (831) 498-9890 so feel free to call us if you have any questions.