KOSS TW150i

KOSS TWS150i True Wireless Earphones User Manual

Model: TW150i

Introduction

Thank you for choosing the KOSS TWS150i True Wireless Earphones. This manual provides essential information for setting up, operating, and maintaining your earphones to ensure optimal performance and longevity. The KOSS TWS150i offers a seamless audio experience with Bluetooth 5.0 connectivity, extended battery life, and smart voice alerts, designed for both home listening and on-the-go use.

KOSS TWS150i True Wireless Earphones and Charging Case

Image: The KOSS TWS150i True Wireless Earphones, showing both earbuds and their compact charging case.

Package Contents

Ensure all items are present in the package:

KOSS TWS150i True Wireless Earphones (Left and Right)
Portable Charging Case
USB Charging Cable
Silicone Earpads (Small, Medium, Large sizes)

Setup Guide

1. Initial Charging

Before first use, fully charge the earphones and the charging case.

Place both earphones into the charging case. Ensure they are seated correctly.
Connect the supplied USB cable to the charging port on the case and the other end to a USB power source (e.g., computer USB port, wall adapter).
The LED indicators on the charging case will illuminate to show charging status. A full charge typically takes approximately 2 hours.

Image: The KOSS TWS150i charging case, showing the LED indicators for battery status.

2. Pairing with a Bluetooth Device

The KOSS TWS150i earphones use Bluetooth 5.0 for a stable wireless connection.

Open the charging case. The earphones will automatically power on and enter pairing mode. The LED indicators on the earphones will flash, indicating they are ready to pair.
On your mobile phone or tablet, go to the Bluetooth settings.
Search for available devices and select "KOSS TWS150i" from the list.
Once connected, the earphone LEDs will stop flashing and remain solid or turn off, and you will hear a confirmation tone.

Note: The earphones will automatically reconnect to the last paired device when taken out of the case, if Bluetooth is enabled on the device.

Image: Close-up view of the KOSS TWS150i earbuds, ready for use.

Operating Instructions

Wearing the Earphones

Select the silicone earpads that provide the most comfortable and secure fit for optimal sound quality and noise isolation. Gently insert the earphones into your ear canals and twist slightly to secure them.

Image: A person wearing a KOSS TWS150i earbud, demonstrating proper fit.

Touch Controls

The KOSS TWS150i earphones feature touch-sensitive controls on each earbud.

Action	Left Earbud	Right Earbud
Play/Pause	Single Tap	Single Tap
Next Track	Double Tap	Double Tap
Previous Track	Triple Tap	Triple Tap
Answer/End Call	Single Tap	Single Tap
Reject Call	Press and Hold (2s)	Press and Hold (2s)
Activate Voice Assistant	Press and Hold (3s)	Press and Hold (3s)
Volume Up	N/A	Press and Hold (1s)
Volume Down	Press and Hold (1s)	N/A

Battery Life and Charging

The earphones provide 5+ hours of playback on a single charge. The charging case extends the total listening time to 25+ hours.
To check battery level on iOS devices, refer to the battery level display feature.

Maintenance

Proper maintenance ensures the longevity and performance of your KOSS TWS150i earphones.

Cleaning: Regularly clean the earphones and charging case with a soft, dry, lint-free cloth. Do not use abrasive cleaners or solvents.
Earpads: Remove and clean the silicone earpads periodically with mild soap and water. Ensure they are completely dry before reattaching.
Charging Contacts: If you experience charging issues, gently clean the charging contacts on both the earphones and inside the case with a dry cotton swab.
Storage: When not in use, store the earphones in their charging case to protect them and keep them charged. Store in a cool, dry place away from extreme temperatures.
Water Resistance: The earphones are waterproof. However, avoid prolonged submersion in water and ensure they are dry before placing them back in the charging case.

KOSS TWS150i Earbuds and case on red textured surface

Image: KOSS TWS150i earphones and charging case, illustrating their compact and durable design.

Troubleshooting

If you encounter issues with your KOSS TWS150i earphones, refer to the following common solutions:

Problem	Possible Solution
Earphones not pairing	Ensure earphones are charged. Turn off and on Bluetooth on your device. Forget "KOSS TWS150i" in your device's Bluetooth settings and try pairing again. Place earphones back in the case, close, wait 5 seconds, then open again to re-enter pairing mode.
Only one earphone working	Ensure both earphones are charged. Place both earphones back in the charging case, close the lid, and then open it again. This often re-syncs them. Try resetting the earphones (refer to manufacturer's website for specific reset instructions if needed, as not provided here).
No sound or low volume	Increase volume on both your device and the earphones. Ensure earphones are properly connected to your device. Clean any debris from the earphone speaker grilles.
Charging case not charging	Try a different USB cable and power source. Ensure the USB cable is fully inserted into the charging port.

Specifications

Feature	Detail
Model	TW150i
Connectivity	Bluetooth 5.0 (Wireless)
Earphone Battery Life	5+ hours
Total Battery Life (with case)	25+ hours
Charging Case Capacity	Increases usage time by 20 hours
Frequency Range	20Hz - 20,000Hz
Weight	44 Grams (total)
Dimensions	5 x 5 x 2 cm (Product)
Water Resistance	Waterproof
Microphone	Built-in, Stereo
Control Type	Touch Control
Special Features	Lightweight, Microphone Included, Volume Control, iOS Phone Control, Smart Voice Alerts

Warranty and Support

KOSS products are designed for durability and performance. For information regarding warranty coverage, please refer to the warranty card included with your purchase or visit the official KOSS website.

For technical support, frequently asked questions, or to contact customer service, please visit the official KOSS support page.
Visit KOSS Support

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