K-550 Wireless Earphones User Manual

Important Safety Information

1. For safety, it is strongly recommended to read this manual and follow the rules mentioned within.

2. Please use a standard charging device to avoid battery damage.

3. Repeated charging and discharging of the earphones will lead to battery performance degradation over time, which is normal for all rechargeable batteries.

4. Keep away from fire sources when using this product.

5. Do not block openings such as the charging port, indicator lights, and earphones.

6. Avoid using earphones at excessive volumes or for extended periods to prevent hearing damage.

7. Do not attempt to disassemble or repair the product yourself if it is damaged for any reason, as this may cause electronic breakdown and permanent damage.

8. Do not wipe the product with oil or other corrosive cleaning agents.

9. Do not use this product in potentially dangerous locations where personal safety may be at risk.

Product Overview & Introduction

Accessories Included:

• Bluetooth earphones * 2
• User manual * 1
• Charging case * 1
• USB cable * 1

FCC ID: 2AVJD-K-550

Quick Pairing

First Step: Open the charging case cover. The earphones will turn on automatically, and the indicator lights will flash. One earphone's light will turn off when both earphones are paired successfully. The other earphone's light will continue to flash, waiting for connection to your mobile phone.

Second Step: Turn on your mobile phone's Bluetooth settings, tap search, and then tap 'K-72' to connect. Once connected successfully, the earphone indicator lights will turn off. When the earphones and your device have been connected once, they will automatically reconnect when turned on with Bluetooth enabled on your device.

Touch Control

• Play/Pause: When music is playing, tap the L/R earphone once.
• Next Track: When music is playing, tap the R earphone twice.
• Previous Track: When music is playing, tap the L earphone twice.
• Answer/Hang Up Call: During an incoming call or while on a call, tap the L/R earphone once.
• Reject Call: During an incoming call, tap the L/R earphone twice.
• Voice Assistant: When connected, press and hold the L/R earphone for 3 seconds.
• Volume Up: Triple-click the left earphone button.
• Volume Down: Triple-click the right earphone button.

Charging Instruction

1. Earphone Charging: Place the earphones into the charging case, ensuring they are positioned correctly. Tap the earphones to start charging. The charging indicator light will remain on until fully charged.
2. Charging Case Charging: When the right earphone is placed in the charging case, the 'R' light turns on. When the left earphone is placed in, the 'L' light turns on. Simultaneously, the display shows the current battery level of the charging case. When the charging case display shows a single digit (0-9), it indicates low power. Please use a 5V/2A charging adapter that meets safety standards. During charging, the single digit on the display will flash. It will show '100' when fully charged.

Specifications

• Model No.: K-550
• Bluetooth Version: 5.4+EDR
• Bluetooth Protocol: HFP/HSP/A2DP/AVRCP
• Earphone Battery: 35mA
• Charging Box Battery: 300mA
• Music/Talking Time: > 4 hours
• Standby Time: > 100 hours
• Charging Time: Approximately 1 hour for the charging case; approximately 1 hour for the charging case to charge the earphones.
• Charging Times: The charging case can charge the earphones more than 4 times on a full charge.

Note: Product parameters may vary depending on the model, usage mode, environment, etc.

FCC Warning Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Caution: Any changes or modifications to this device not explicitly approved by the manufacturer could void your authority to operate this equipment.

This device complies with part 15 of the FCC Rules. Operation is subject to the following 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.

The device has been evaluated to meet general RF exposure requirement.