OnePlus Buds 4 User Guide & Safety Information

Product Information

Product Name: OnePlus Buds 4

Product Model: E513A

Max. Output Power: 13dBm (EIRP)

Frequency Range: 2402~2480MHz

SAR Values (FCC/ISED): 0.856W/kg (10g)

Charging Input: 5V 1.5A

Package Contents:

• OnePlus Buds 4
• Type-C Charging Cable
• Silicone Earplugs (S, M, G)
• User Guide & Safety and Warranty

Getting Started

Replacing Ear Caps

The correct size of ear caps is essential for optimal noise reduction, sound quality, and comfort. Try different sizes to find the best fit. Note that your left and right ears may require different sizes. Medium (M) size ear caps are pre-installed.

Pairing and Connection

Connection to OnePlus Phone

For OnePlus 6 and later models: Enable Bluetooth on your phone, open the earphone charging case and place it near your phone. Follow the on-screen instructions.

Connection to Other Devices

Place the earbuds in the charging case and open the lid. Press and hold the function button for 2 seconds until the white indicator flashes. Then, go to your device's Bluetooth settings and select "OnePlus Buds 4".

Factory Reset

Place the earbuds in the charging case and open the lid. Press and hold the function button for 15 seconds until the red indicator flashes to restore the earbuds to factory settings.

Function Settings and Updates

For OnePlus Phone Users: Update the "Wireless Earphones" app (ColorOS 11+) or "OnePlus Buds" app (HydrogenOS 11) to the latest version. Customize earphone functions in your phone's Bluetooth settings.

For Other Android (and iOS) Users: Download and install the "HeyMelody" app from the Google Play Store or App Store to customize functions and update firmware.

Touch Controls

The earbuds feature touch controls. Touch the indicated area to perform operations.

* Functions marked with an asterisk (*) are disabled by default and can be enabled in the app settings.

Charging

Place the earbuds in the charging case and close the lid to charge. The indicator light shows the battery status.

Indicator Colors:

• Green: High battery level
• Yellow: Medium battery level
• Red: Low battery level

Charging the Charging Box: Use a USB-C charging cable. Charging: Yellow light is solid. Charging done: Green light is solid.

Safety and Security Information

Please read and observe the following to ensure optimal performance and avoid dangerous or illegal situations.

• Temperature: Use between 0°C to +35°C; store between -10°C to +50°C. Extreme temperatures may cause malfunction. Battery performance may be affected below 5°C.
• Charging Environment: Charge in a well-ventilated area between 5°C and 35°C. Fast charging may be unavailable outside 15°C to 35°C.
• Do not charge the battery for more than 12 hours.
• Use only manufacturer-approved chargers, cables, and accessories to prevent electric shock, fire, or explosion.
• Do not replace, disassemble, modify, crush, or cut the battery.
• Avoid direct sunlight, heat sources, or low air pressure locations.
• Batteries degrade over time and should be recycled or disposed of properly.
• Avoid dusty, smoky, humid, dirty, or magnetic environments.
• Discontinue use if the product is cracked or damaged.
• Hearing Protection: Avoid listening at high volumes for extended periods to prevent hearing damage.
• Do not use in potentially explosive atmospheres or near blasting caps.
• Observe safety instructions in hospitals, service stations, schools, and aircraft.
• Do not use while driving.
• Electronic Implants: If you have implants (e.g., pacemakers), keep the device at least 15 cm away from the implant.
• Keep the device and accessories away from small children. Small parts may cause choking hazards. Supervise children during use.

Regulatory Conformance

FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Manufacturer is not responsible for radio or TV interference caused by unauthorized modifications. This equipment has been tested and found to comply with the limits for a Class B digital device.

FCC Caution

Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Antennas used for this transmitter must not be co-located or operated in conjunction with any other antenna or transmitter.

RF Exposure Information (SAR)

This device is designed and manufactured not to exceed the emission limits for radio frequency (RF) energy exposure set by the U.S. Government. The FCC SAR limit is 1.6W/kg. SAR tests are conducted using standard operating positions accepted by the FCC. The actual SAR level can be well below the maximum value.

ISED Statement

This device contains licence-exempt transmitters/receivers that comply with Innovation, Science and Economic Development Canada's licence-exempt RSS(s). Operation is subject to two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation. This equipment complies with Canadian ICES-GEN Class B and IC RSS-102 radiation exposure limits.

RF Exposure Information (SAR)

The ISED SAR limit is 1.6W/kg. This device has also been tested and meets ISED RF exposure guidelines. Avoid using accessories with metal parts that may alter RF performance.

Limited Warranty

OnePlus provides comprehensive warranty services for non-human factor damage according to local laws. A valid Proof of Purchase is required. The warranty does not apply in cases of:

• Expiration of the warranty period.
• Accidental damage (drops, water immersion).
• Damage from unauthorized disassembly, modification, etc.
• Force majeure (fire, earthquake, lightning).
• Improper usage not conforming to the user guide.
• Usage in environments not conforming to product specifications.
• Inconsistent or altered warranty information or proof of purchase.
• Missing, damaged, or illegible product serial number (SN).