1. Introduction
This manual provides detailed instructions for the LETSCOM U8I Bluetooth Headphones. Please read this manual carefully before using the product to ensure proper operation and to maximize its lifespan. Keep this manual for future reference.
2. Package Contents
Verify that all items listed below are included in your package:
- 1 x LETSCOM U8I Bluetooth Headphones
- 1 x Eva bag (carrying case)
- 3 pairs x Eartips (Large, Medium, Small)
- 1 x Micro USB charging cable
- 1 x Wire clip (removable)
- 1 x User manual
Figure 2.1: LETSCOM U8I Package Contents. This image displays all items included in the product package, neatly laid out for identification.
3. Product Overview
The LETSCOM U8I headphones feature an ergonomic design for comfortable fit and are built with IPX7 waterproofing, making them suitable for sports and active use.
Figure 3.1: LETSCOM U8I Bluetooth Headphones. This image shows the headphones and their accompanying travel case.
Figure 3.2: Ergonomic Design. This image demonstrates how the headphones fit comfortably around the ear, ensuring stability during activity.
4. Setup
4.1 Charging the Headphones
Before first use, fully charge the headphones. Connect the Micro USB charging cable to the charging port on the headphones and the other end to a USB power source (e.g., computer, wall adapter). The LED indicator will show charging status.
- Charging time: 1-2 Hours
- Battery Capacity: 100mAh/3.7V
4.2 Pairing with a Bluetooth Device
- Ensure the headphones are turned off.
- Press and hold the Multi-function button until the LED indicator flashes red and blue alternately, indicating pairing mode.
- Enable Bluetooth on your device (smartphone, tablet, etc.) and search for available devices.
- Select "U8I" from the list of found devices.
- Once connected, the LED indicator will flash blue slowly, and a voice prompt will confirm successful pairing.
The headphones utilize Bluetooth 4.1 for stable connection.
Figure 4.1: Stable Bluetooth Connection. This graphic highlights the Bluetooth 4.1 technology and CSR chip for reliable audio transmission.
5. Operating Instructions
5.1 Power On/Off
- Power On: Press and hold the Multi-function button for 3 seconds.
- Power Off: Press and hold the Multi-function button for 3 seconds.
5.2 Music Playback
- Play/Pause: Short press the Multi-function button.
- Next Track: Long press the Volume + button.
- Previous Track: Long press the Volume - button.
- Volume Up: Short press the Volume + button.
- Volume Down: Short press the Volume - button.
5.3 Call Management
- Answer/End Call: Short press the Multi-function button.
- Reject Call: Long press the Multi-function button.
- Redial Last Number: Double press the Multi-function button.
The headphones feature CVC6.0 Digital Noise Canceling Technology for clear calls and audio.
Figure 5.1: High Fidelity Stereo Sound. This image illustrates the audio capabilities, including rich bass and clear high frequencies, along with noise cancellation.
Figure 5.2: Extended Playtime. This image shows the headphones in use during a workout, emphasizing the 8-hour battery life.
6. Maintenance
6.1 Cleaning
Wipe the headphones with a soft, dry cloth. Do not use abrasive cleaners or solvents. For eartips, they can be gently removed and cleaned with mild soap and water, then thoroughly dried before reattaching.
6.2 Storage
Store the headphones in the provided Eva bag when not in use to protect them from dust and damage. Avoid storing in extreme temperatures or high humidity.
6.3 Waterproofing
The headphones are IPX7 waterproof, meaning they can withstand submersion in up to 1 meter of water for 30 minutes. However, they are not designed for swimming or prolonged submersion. Ensure the charging port cover is securely closed before exposure to water.
Figure 6.1: IPX7 Waterproof Rating. This image highlights the headphones' resistance to water, making them suitable for workouts and outdoor activities.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Charge the headphones fully. |
| Cannot pair with device. | Headphones not in pairing mode; Bluetooth off on device; device too far. | Ensure headphones are in pairing mode (red/blue flashing LED). Turn on Bluetooth on your device. Move device closer to headphones (within 10 meters). |
| No sound or poor sound quality. | Volume too low; headphones not connected; interference. | Increase volume on both headphones and device. Reconnect headphones. Move away from sources of interference. |
| Intermittent connection. | Obstacles between device and headphones; out of range. | Ensure no obstacles. Stay within operating range (up to 33 feet/10 meters). |
8. Specifications
| Feature | Detail |
|---|---|
| Model | U8I |
| Waterproof Rate | IPX7 |
| Operating Range | Up to 33 feet / 10 meters (No obstacle between) |
| Standby Time | 250 hours |
| Charging Time | 1-2 Hours via Micro-USB cable |
| Talk/Playing Time | About 6-8 hours |
| Battery Capacity | 100mAh/3.7V, Rechargeable Lithium-Ion |
| Earphone Type | In Ear / Ear Hook |
| Bluetooth Standard | V4.1 |
| Microphone | Built-in |
| Noise Reduction | CVC6.0 Digital Noise Canceling Technology |
| Material | Plastic |
| Control Type | Media Control |
| Specific Uses | Travel, Sports and Exercise |
9. Important Safety Information
- Do not disassemble or modify the product.
- Keep away from extreme temperatures and direct sunlight.
- Avoid dropping or subjecting the headphones to strong impacts.
- Do not expose to fire or dispose of in fire.
- Use only the provided or certified charging cables.
- Prolonged listening at high volume levels may cause hearing damage.
