1. Introduction
Thank you for choosing the Lenovo X4 Bone Conduction Wireless Bluetooth Headphones. These headphones are designed for sports enthusiasts, offering a comfortable, stable, and open-ear listening experience with advanced bone conduction technology. Please read this manual carefully before using the earbuds to ensure proper operation and to maximize your enjoyment of the product.
2. Package Contents
Ensure all items are present in your package:
- 1 x Lenovo X4 Earphone
- 1 x Charging Cable
- 1 x User Manual
3. Product Specifications
| Feature | Specification |
|---|---|
| Product Number | Lenovo X4 |
| Product Material | PC |
| Bluetooth Version | 5.3 |
| Working Frequency Band | ISM band (2.402-2.480GHZ) |
| Battery Capacity | 150 mAh |
| Rated Input | 5V 110mA |
| Charging Time | About 2 hours |
| Playing Time | About 7 hours |
| Transmission Distance | 10m (<10m) |
| Bluetooth Protocol | A2DP/AVRCP/HSP/HFP |
| Audio Power Amplifier | IC HT2144 GFN16 |
| Weight | 28g |
| Waterproof Rating | IPX8 (structural waterproof design), IP56 protection |
| Sound Isolating | Yes |
| Headphone Pads Material | Other |
| Magnet Type | Neodymium |
| Total Harmonic Distortion | 1% |
| Impedance Range | Up to 32 Ω |
| Codecs | Apt-X HD |
| Microphone | Yes, with ENC environment call noise reduction |
| Active Noise-Cancellation | Yes |
| Volume Control | Yes |
| Control Button | Yes (touch control) |
| Vocalism Principle | Bone Conduction |
| Style | Neckband headphones |
| Certification | CE, FCC |
4. Setup Guide
4.1 Product Diagram
- Indicator: Shows device status.
- TYPE-C Charging Port: For charging the device.
- Microphone: For calls and voice commands.
- Plus Key: Volume up, other functions.
- Bone-Conduction Vibrator: Transmits sound through bone.
- Minus Key: Volume down, other functions.
4.2 Power On/Off
To power on or off the headphones, long press the Plus key for approximately 3 seconds. The red and blue lights will flash to indicate the status.
4.3 Bluetooth Connection
- Ensure the headset is powered on.
- On your smart device (e.g., smartphone), go to Bluetooth settings.
- Turn on Bluetooth.
- Search for Bluetooth devices. The headset should appear as "联想thinkplus-X4".
- Select "联想thinkplus-X4" to connect. A light blue slow flash indicates a successful connection. The blue light will go off when music is playing.
5. Operation
5.1 Button Functions
- Power On/Off: Long press the multi-function button for 3 seconds.
- Previous Song: Double-click the function key.
- Next Track: Double-click the function key.
- Answer/Hang Up Call: Click the function key.
- Incoming Call Rejection: Long press the multi-function button for 2 seconds.
- Volume Up/Down: Use the dedicated Plus (+) and Minus (-) keys.
5.2 Indicator Light Description
- Red and Blue Flashing: Powering on/off or pairing mode.
- Light Blue Slow Flash: Bluetooth connected.
- Blue Light Off (during music playback): Normal operation.
- Red Light (on phone display): Battery low, needs charging.
5.3 Wearing Method
The Lenovo X4 features an ergonomic on-ear design with a titanium wire for a balanced body, ensuring stability during movement. It is designed for comfortable wear, even with glasses, without causing discomfort.
6. Maintenance
6.1 Charging
When the phone displays a red light for power, it indicates that charging is needed. Plug the 5V charger into the USB charging cable to charge the headphones.
6.2 Waterproofing and Care
The Lenovo X4 headphones are designed with IPX8 depth waterproof and IP56 protection, making them sweat-proof, rain-proof, and splash-proof. This allows you to enjoy sports without worrying about water damage.
- During use, ensure the TYPE-C silicone plug is closed to prevent rainwater and sweat from entering.
- Before charging, open the silicone plug and ensure there is no water inside.
- If any liquid accidentally splashes onto the product, wipe it dry immediately.
- Do not place the headphones in an environment with strong electromagnetic force, as this may cause malfunction.
6.3 Flexibility
The memory titanium alloy frame of the Lenovo X4 can be twisted arbitrarily to fit different head sizes and will not deform, ensuring long-term durability.
7. Troubleshooting
- Cannot Power On: Ensure the headphones are charged. Long press the power button for 3 seconds.
- Cannot Connect via Bluetooth: Make sure Bluetooth is enabled on your device and the headphones are in pairing mode (red and blue lights flashing). Try forgetting the device on your phone and re-pairing.
- No Sound: Check the volume levels on both the headphones and your connected device. Ensure the headphones are properly connected.
- Poor Sound Quality: Ensure the headphones are within the 10m transmission range of your device. Check for any obstructions or strong electromagnetic interference.
- Call Issues: Ensure the microphone is not obstructed. Check Bluetooth connection stability.
8. User Tips
- The Lenovo X4 headphones are capable of producing quite high volume levels, which can be beneficial for users who may have some hearing difficulties.
- The bone conduction technology allows for an open-ear experience, keeping you aware of your surroundings, which is great for outdoor activities like running or cycling.
- The flexible titanium alloy frame ensures a secure and comfortable fit for various head sizes, making it ideal for active use.
9. Safety Warnings and Environmental Information
9.1 Hazardous Substances in Products
This form is compiled in accordance with SJ/T 11364.
| Part Name | Pb (Lead) | Hg (Mercury) | Cd (Cadmium) | Cr(VI) (Hexavalent Chromium) | PBB (Polybrominated Biphenyls) | PBDE (Polybrominated Diphenyl Ethers) |
|---|---|---|---|---|---|---|
| Printed circuit assembly | X | O | O | O | O | O |
| Small structural parts | O | O | O | O | O | O |
| TYPE-C charging port | X | O | O | O | O | O |
O: Indicates that the content of the hazardous substance in all homogeneous materials of the part is below the limit requirements specified in GB/T 26572.
X: Indicates that the content of the hazardous substance in at least one homogeneous material of the part exceeds the limit requirements specified in GB/T 26572. The parts marked with "X" cannot be replaced by hazardous substances due to restrictions in the global technological development level.
Note: Printed circuit board components include printed circuit boards and their parts, electronic components, etc. Depending on the product model, the product you purchased may not contain all the above components.
9.2 General Warnings
WARNING: Please mind potential fire risk and strictly follow the instruction manual for charging and storage. For disposal, please check your local authority's website for more information and dispose of the lithium-ion battery safely in accordance with the applicable legal requirements.
Electronic and electrical products sold in the People's Republic of China must bear the appropriate Logo. The number in the logo represents the product's environmental protection period under normal environmental conditions.
10. Warranty and Support
10.1 Disclaimer
This user manual does not have any form of guarantee, position expression, or other implication. The mentioned products, specifications, and information are for reference only, and the content will be updated on the webpage at any time, without additional notification.
10.2 Warranty Statement
The product attached to this document is guaranteed as follows: If the product has quality defects or is damaged under normal conditions of use within twelve (12) months from the date of purchase ("Warranty Period"), it can be repaired free of charge. If the manufacturer confirms that it cannot be repaired, a free replacement will be provided. Repaired or replaced products will continue to enjoy the warranty during the remaining warranty period (the shortest not less than 30 days). The purchase date on the sales ticket shall prevail; if the purchase date cannot be determined, the warranty period shall be 13 months from the manufacturing date.
To apply for a warranty, please call the product service hotline first and follow the instructions provided. When applying for warranty, you need to provide an accurate, complete, and clearly filled out valid sales invoice.
10.3 Warranty Exclusions
The above guarantee does not apply to the following situations:
- The validity period of the product warranty has been exceeded.
- Alteration of the warranty card and product code does not match the product body.
- Causes due to misuse, abuse, improper transportation, maintenance, or storage, resulting in damaged or impaired functionality.
- Failure or damage caused by force majeure (such as earthquake, war, fire, etc.) or accident.
- Damage to components like zippers and buckles due to excessive force.
- Disconnection or tearing caused by excessive load.
- Any damage caused by sharp objects.
- Products with signs of burning or flooding.
- Damage caused by unauthorized disassembly.
- Aging, discoloration, abrasion, rupture, and other losses that occurred during normal use of the product.
- If the original identification label of the product is changed or damaged, this guarantee will become invalid.
The completeness and appearance of the product and accompanying materials are not within the scope of the guarantee. You should check them upon receipt and raise any objections to discrepancies immediately.
The above guarantees are all guarantees made regarding the products and are only applicable in mainland China. Nothing in this document affects consumer rights that cannot be excluded or restricted under applicable law.
10.4 Contact Information
- After-sales service Email: frank@szeysan.cn
- Service supervision hotline: 400-812-0102
"Lenovo" "thinkplus" and other Lenovo logos are trademarks of Lenovo Group or its affiliated company. Other trademarks, company names, products, or services mentioned in this material may be trademarks of a Lenovo Group company or another company.
Copyright © 2022 Lenovo (Beijing) Co., Ltd. All rights reserved.
11. Product Demonstration Video
12. Additional Resources
For a comprehensive guide and additional documents, please refer to the official user manual PDF:
