GLL Bluetooth Headphones User Manual

Introduction

Thank you for choosing the GLL Bluetooth Headphones. This manual provides detailed instructions to help you set up, operate, and maintain your new wireless headset. Please read this manual carefully before use to ensure optimal performance and longevity of your device.

These headphones feature Bluetooth 5.0 technology, a noise-canceling microphone, and a comfortable on-ear design, making them suitable for various communication and audio needs.

Package Contents

Ensure all items are present in the package:

• GLL Bluetooth Headphones with Microphone
• USB Charging Cable
• User Manual (this document)

Product Overview

Familiarize yourself with the components of your GLL Bluetooth Headphones.

Image: Function Key Diagram. This image illustrates the various buttons and components of the GLL Bluetooth Headphones, including the microphone, microphone mute key, multi-functional button, volume controls (+/-), and track navigation buttons (previous/next).

• Microphone: Flexible boom microphone for clear voice pickup.
• Microphone Mute Key: Button located on the microphone boom to mute/unmute during calls.
• Multi-functional Button: Used for power on/off, pairing, play/pause, and call management.
• Volume Buttons (+/-): Adjusts audio volume.
• Track Navigation Buttons: Skips to the previous or next song.
• Charging Port: USB port for charging the headphones.
• LED Indicator: Displays status such as power, pairing, and charging.

Setup

1. Charging the Headphones

Before first use, fully charge the headphones. A full charge takes approximately 2 hours.

1. Connect the provided USB charging cable to the charging port on the headphones.
2. Connect the other end of the USB cable to a USB power source (e.g., computer USB port, USB wall adapter).
3. The LED indicator will show the charging status (e.g., red for charging, blue for fully charged).

Image: Long Lasting Battery. This image highlights the battery performance of the GLL Bluetooth Headphones, showing 15 hours of talk time (at 50% volume), 15 hours of music (at 50% volume), 100 hours of standby, and a 2-hour charging time.

2. Powering On/Off

• To Power On: Press and hold the Multi-functional Button for approximately 3 seconds until the LED indicator flashes blue.
• To Power Off: Press and hold the Multi-functional Button for approximately 3 seconds until the LED indicator flashes red and then turns off.

3. Bluetooth Pairing

The headphones can connect to two devices simultaneously.

1. First Device Pairing:
   • Ensure the headphones are powered off.
   • Press and hold the Multi-functional Button for about 5-7 seconds until the LED indicator flashes red and blue alternately. This indicates pairing mode.
   • On your device (phone, computer, tablet), enable Bluetooth and search for available devices.
   • Select "GLL Headphones" (or similar name) from the list.
   • Once connected, the LED indicator will flash blue slowly.
2. Second Device Pairing (Multi-point Connection):
   • After successfully pairing with the first device, disable Bluetooth on the first device.
   • The headphones will re-enter pairing mode (red and blue flashing LED).
   • Pair with the second device following the same steps as for the first device.
   • Once paired with the second device, re-enable Bluetooth on the first device. The headphones should automatically reconnect to both devices.

Image: Dual Devices Connection. This image demonstrates the GLL Bluetooth Headphones' ability to connect to two devices simultaneously, such as a smartphone for music and another for calls.

Image: Multi-device Compatible. This image shows the GLL Bluetooth Headphones wirelessly connected to various devices including a laptop, desktop monitor, tablet, and smartphone, highlighting its broad compatibility.

Operating Instructions

Call Management

• Answer/End Call: Press the Multi-functional Button once.
• Reject Call: Press and hold the Multi-functional Button for approximately 2 seconds.
• Redial Last Number: Double-press the Multi-functional Button.
• Mute Microphone: Press the Microphone Mute Key on the boom mic during a call. A beep sound will remind you every 15 seconds when muted. Press again to unmute. Note: This function is primarily for cell phone calls and may not work with all third-party applications like Skype.

Image: Directional Microphone with Mute Function. This image shows a user wearing the GLL Bluetooth Headphones, emphasizing the directional microphone and an inset demonstrating how to use the mute button located on the microphone boom. It also indicates Siri activation on standby mode.

Audio Playback

• Play/Pause: Press the Multi-functional Button once.
• Next Track: Press the "Next Track" button.
• Previous Track: Press the "Previous Piece" button.
• Volume Up: Press the "Volume +" button.
• Volume Down: Press the "Volume -" button.

Voice Assistant

• Activate Voice Assistant (Siri, Google Assistant): While in standby mode, press the Multi-functional Button once.

Comfort and Fit

The GLL Bluetooth Headphones are designed for comfortable wearing during extended periods.

• Adjustable Headband: Extend or retract the headband to fit your head size.
• Swiveling Earcups: The earcups can swivel 90 degrees for a better fit and to lay flat for storage.
• Soft Ear Cushions: Memory foam ear cushions provide comfort.
• Foldable Design: The headphones can be folded for easy storage and portability.

Image: All-day Comfort Features. This image illustrates the comfort features of the GLL Bluetooth Headphones, including the scalable headband, 270-degree rotatable microphone, soft padded earpads, and collapsible design for easy storage.

Maintenance

• Cleaning: Use a soft, dry cloth to clean the headphones. Do not use abrasive cleaners or solvents.
• Storage: Store the headphones in a cool, dry place away from direct sunlight and extreme temperatures. When not in use for extended periods, ensure they are fully charged.
• Battery Care: To prolong battery life, avoid fully discharging the headphones frequently. Charge them regularly.

Troubleshooting

No Power

• Ensure the headphones are fully charged. Connect to a power source and check the LED indicator.
• Verify the charging cable and power adapter are working correctly.

Cannot Pair with Device

• Ensure the headphones are in pairing mode (LED flashing red and blue alternately).
• Make sure Bluetooth is enabled on your device and it is within range (typically 10 meters or 33 feet).
• Turn off and on the Bluetooth function on your device.
• Restart both the headphones and your device.
• Clear the Bluetooth pairing history on your device and try pairing again.

No Sound or Low Volume

• Increase the volume on both the headphones and your connected device.
• Ensure the headphones are properly connected to your device. Reconnect if necessary.
• Check if the audio output on your device is set to the GLL Bluetooth Headphones.

Microphone Not Working

• Ensure the microphone is not muted. Press the Microphone Mute Key to unmute.
• Check the microphone settings on your connected device to ensure the GLL Bluetooth Headphones microphone is selected as the input device.
• Restart the headphones and your device.

Specifications

Warranty and Support

GLL products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official GLL website.

For further assistance, you may contact GLL customer service through the platform where you purchased the product.

Safety Information

• Do not expose the headphones to extreme temperatures, humidity, or liquids.
• Avoid dropping or subjecting the headphones to strong impacts.
• Do not attempt to disassemble or repair the headphones yourself. This will void the warranty.
• Listen at moderate volume levels to prevent hearing damage.
• Keep out of reach of children.