Introduction
Welcome to the user manual for your new Lenovo LE503 OWS Wireless Earphones. These open-ear earbuds are designed for comfort and high-quality audio, featuring Bluetooth V6.0, ENC noise reduction, and a waterproof design, making them ideal for various activities.
Safety Warnings
- The product features an IPX4 waterproof rating, meaning it is resistant to splashes and sweat. However, do not immerse the product in water or any other liquid, as it is not designed for full submersion.
- If any liquid accidentally enters the product, immediately disconnect it from power and discontinue use.
- To avoid electric shock, ensure your hands are dry before installing or uninstalling the product.
Package Contents
Please check the box for the following items:
- 2 x Lenovo LE503 OWS Wireless Earphones
- 1 x Charging Case
- 1 x Type-C Charging Cable
- 1 x User Manual
Product Overview

Figure 1: Lenovo LE503 OWS Wireless Earphones and Charging Case

Figure 2: User wearing the LE503 earphones, showcasing HiFi audio and directional sound.

Figure 3: Overview of key features including Bluetooth 6.0, Noise Reduction, and IPX4 Waterproofing.

Figure 4: Close-up of the IPX4 waterproof and sweat-resistant design, suitable for active use.

Figure 5: Illustration of Smart AI Noise Cancellation for clear calls in various environments.

Figure 6: Detailed features for comfort and superior sound, including the 13mm titanium diaphragm driver and ergonomic design.
Video 1: A short promotional video showcasing the features and design of the Lenovo LE503 earphones, including sound quality, battery life, comfort, and waterproof capabilities.
Setup
- Initial Charge: Before first use, fully charge the earphones and charging case using the provided Type-C cable. Connect the cable to the charging port on the case and a compatible USB power source. The LED indicator on the case will show charging status.
- Power On: Open the lid of the charging case. The earphones will automatically power on and enter pairing mode.
- Pairing:
- Ensure Bluetooth is enabled on your device (smartphone, tablet, laptop, etc.).
- Search for available Bluetooth devices and select "LE503" from the list.
- Once connected, you will hear a confirmation tone, and the earphones will be ready for use.
Operating Instructions
- Power On: Open the charging case lid—the earphones power on automatically.
- Power Off: Place the earphones back into the charging case and close the lid—the earphones power off.
- Control Method: The earphones feature touch buttons for various functions. Refer to the specific touch control gestures for playback, call management, and voice assistant activation (details typically found in the quick start guide or product packaging).
Product Features
- High-Fidelity Audio: Delivers clear music playback and call quality.
- Noise Cancellation (ENC): Effectively reduces ambient noise interference for clearer calls.
- Ergonomic Fit: Designed for comfortable, secure wear with an open-ear earhook style.
- IPX4 Waterproof: Resistant to splashes and sweat, suitable for workouts and outdoor activities.
- Long Battery Life: Up to 4 hours of single-use listening, extended to approximately 45 hours with the charging case.
- 13mm Titanium Diaphragm Driver: Provides rich bass and clear treble.
- 720° Spatial Audio Algorithm: Enhances the immersive sound experience.
- HD Dual-Mic Noise Cancellation: Ensures superior call clarity.
- Upgraded Memory Titanium Wire: Built-in flexible wire for durability and a comfortable fit.
Specifications

Figure 7: Product dimensions and key specifications.
| Attribute | Value |
|---|---|
| Brand Name | Lenovo |
| Model | LE503 |
| Material | ABS, PC, Silica Gel |
| Weight (per earbud) | Approximately 5g |
| Battery Capacity (Earbuds) | 40mAh*2 |
| Battery Capacity (Charging Case) | 300mAh |
| Battery Life (Single Use) | About 4 hours |
| Communication Distance | Up to 10 meters |
| Bluetooth Version | V6.0 |
| Charging Method | Type-C |
| Waterproof Rating | IPX4 |
| Frequency Response Range | 20 - 20000Hz |
| Impedance Range | Up to 32 Ω |
| Vocalism Principle | Dynamic |
| Number Of Drivers | 2 |
| Voice Assistant Built-in | Yes |
| Control Button | Yes (Touch buttons) |
| Volume Control | Yes |
| Style | OWS Ear Hook Headphones |
| Certification | CE, FCC |
| Charging Case Dimensions | 79mm x 67mm x 29mm |
| Earbud Dimensions | 46mm x 32.3mm |
Precautions
- Do not use the earphones in extremely high-temperature or humid environments.
- Do not disassemble the earphones arbitrarily, as this may impair performance and void the warranty.
- Turn off the power (by placing them in the charging case and closing the lid) after use to extend battery life.
Troubleshooting (FAQ)
- Cannot Connect: If the earphones fail to connect, try restarting your device (smartphone, tablet, etc.) or resetting the Bluetooth settings on your device.
- Intermittent Audio: Check the battery level of both earphones and the charging case. Also, ensure you are not too far from your connected device or near strong sources of signal interference.
- No Sound from Earphones: Verify that the earphones are correctly paired with your device. Ensure that the audio output is enabled and selected for the earphones on your device's settings.
User Tips
- Regular Cleaning: Gently clean the earphones and charging case regularly with a soft, dry cloth to maintain hygiene and performance.
- Optimal Fit: Adjust the earhooks to ensure a comfortable and secure fit, which can also improve sound quality.
- Firmware Updates: Check the official Lenovo support website periodically for any available firmware updates for your earphones to ensure optimal performance and new features.
Warranty and Support
For detailed warranty information, technical support, or service inquiries, please refer to the official Lenovo website or contact your authorized retailer. Keep your proof of purchase for warranty claims.





