User Manual

Product Overview

This section details the components of the Avantree TWS120 True Wireless Earbuds.

Earbuds

Diagram showing the Left (L) and Right (R) earbuds. Each earbud is depicted as an elongated shape with a rounded top, featuring a touch-sensitive area marked by a dashed line. A small circular element is visible on the side of each earbud.

Charging Case

Diagram of the charging case in an open state, revealing the internal contours for holding the earbuds. Two LED indicators, labeled LED 1 and LED 2, are visible on the exterior of the case.

Included Accessories

• EarGels: Illustrations of several silicone eartips in various sizes, designed to fit the earbuds.
• Micro-USB Cable: Illustration of a Micro-USB cable, showing a standard USB-A connector on one end and a Micro-USB connector on the other.

How to Wear

Select & Replace Eartips

To achieve the best listening experience, try each of the different sized eartips to find the pair that fits your ears most comfortably. The medium-sized eartips are pre-mounted on the earphones. Ensure the eartips are firmly attached. Flip the eartips over and mount them onto the earphones. Then, adjust the earbud's position to aim the microphone hole towards your mouth.

Fitting Adjustment

Insert the earphone into your ear and adjust its position until you find a comfortable fit. A better fit leads to better noise isolation.

How to Charge

The Avantree TWS120 offers up to 8 hours of battery life in the earphones, and the charging case provides an additional 3-3.5 charges, totaling up to 36 hours of playtime.

Charging the Earphones

When you hear the “battery low” voice prompt, place the earphones back into the charging case. It takes approximately 1.5 hours to fully charge the earphones. During charging, the LED indicators on the earphones will illuminate RED. Once charging is complete, the LED indicators will turn WHITE for 10 seconds before automatically turning off.

Visual representation:

• (audio prompt: 'battery low')
• Earbud LED: Solid RED (while charging)
• Earbud LED: Solid WHITE (for 10 seconds), then off (fully charged)

(Note: The earphones will automatically turn off about 10 minutes after the first low battery warning.)

Charging the Case

Charge the case if its left-side LED (LED 1) is flashing RED. Charging the case also charges the earphones if they are inside. Use a DC 5V / 0.5-2A USB wall charger, car charger, or computer USB port with the included Micro-USB cable. The left-side LED (LED 1) will illuminate RED while charging. When fully charged, the left-side LED (LED 1) will turn off, and the right-side LED (LED 2) will illuminate GREEN.

Visual representation:

• Connection to DC 5V / 0.5-2A power source (e.g., wall adapter icon).
• Connection to a computer USB port (computer icon).

Basic Operations

LED Indications

For Earphones

• Connected with mobile device: LED on the R earphone double-flashes WHITE every 5s.
• Not connected with mobile device: LED on the R earphone flashes WHITE once every 1s.
• Earphones connected with each other: LED on the L earphone double-flashes WHITE every 5s.
• Earphones not connected with each other: LED on the L earphone flashes WHITE once every 1s.
• Battery low: LEDs will flash RED 4 times every 2 mins.
• Charging: LEDs stay SOLID RED.
• Fully charged: RED LEDs turn to WHITE for about 10s then turn off.

For Charging Case

• Battery low: Left-side LED (LED 1) flashes RED.
• Charging: Left-side LED (LED 1) stays SOLID RED.
• Fully charged: Right-side LED (LED 2) turns SOLID GREEN.

How to Pair

Connect to a Bluetooth Device

Follow these steps to connect your Avantree TWS120 earbuds to a Bluetooth device:

1. Open the case to turn ON the earphones. Note: LED indicators on the earphones should already be flashing WHITE.
2. Wait for the LED on the R earphone to start flashing WHITE & RED alternately – this indicates Pairing Mode.
3. Search for and select "Avantree TWS120" from the Bluetooth menu on your device. You will see it shown as "Connected".
4. The earphones will automatically reconnect to your device the next time you take them out of the case.

Visual representation of smartphone Bluetooth settings screens showing pairing status.

NOTE: To connect with ANOTHER device, please turn off Bluetooth on the previously connected device first.

Mono Earphone Use

Both the R and L earphones can be used independently.

To use the R earphone independently:

1. Open the case to turn on both earphones.
2. Pick out the R earphone and close the case. Wait for auto-reconnection to your device. You will see "Avantree TWS120" shown as "Connected" and hear "Connected" from the R earphone.

To use the L earphone independently:

1. Open the case to turn on both earphones.
2. Pick out the L earphone and close the case. Wait for the LED on the L earphone to flash WHITE & RED alternately – this indicates PAIRING MODE.
3. Search for and select "Avantree TWS120S" from the Bluetooth menu on your device.

How to Clear Pairing History / Reset

Reset the R Earphone

1. Open the case to turn ON the earphones. Note: Earphone LED indicators should already be flashing WHITE.
2. Wait for the LED on the R earphone to flash WHITE & RED alternately – Pairing Mode.
3. Long press the R earphone for about 10 seconds until LED lights on WHITE & RED simultaneously (looks like PINK) for about 5 seconds.

Visual representation of the reset process.

Reset the L Earphone

1. Open the case and pick out the L earphone only. Then close the case.
2. Wait for the LED on the L earphone to flash WHITE & RED alternately – Pairing Mode.
3. Long press the L earphone for about 10 seconds, until LED lights on WHITE & RED simultaneously (looks like PINK) for about 5 seconds.

Visual representation of the reset process.

Note: The steps above can only clear the pairing history between TWS120 / TWS120S and your Bluetooth device. If you experience one-sided sound, please visit avantree.com/tws120/video to connect the two earphones manually.

Please forget / delete any TWS120 / TWS120S on the Bluetooth list of your device before you want to pair it again.

Support

FAQ

View the FAQs on https://avantree.com/product-support/BTHS-TWS120-BLK.

How to Take Care of Your TWS120

• Always store the earphones inside the charging case and make sure that they are safely protected.
• If you would like to clean your earphones, we recommend that you follow these instructions.
• The TWS120 is designed to function optimally between the temperatures of 0°C and 40°C (32-100°F). Although it can and will function beyond this temperature range, performance may be impaired.
• Avoid storing the earphones for extended periods of time without recharging them (max. three months).
• The charging case is designed to charge using standard USB voltage (5v ± 0.25v). It is not recommended to charge this product using power supplies/sources with higher voltage.