Cowon Systems CK20- F8 Wireless Earphones with Noise Reduction User Manual

Cowon Systems CK20- F8 Wireless Earphones with Noise Reduction

FOR THE FIRST USE

1. Open the cover of the charger box, the earphones will Switch on automatically. The blue light on flashes quickly, after a beep, the unit enters pairing mode.
2. Turn on the Bluetooth function of your mobile phone or another smart device. Find “F9”, click “Pairing” to connect, and star using.

For the Second Use

1. Auto-Disconnect
   Insert the earbuds into the charging box and close the cover, the Bluetooth the connection will be automatically disconnected.

2. Auto-Reconnect
   For the second use, simply open the charger box and the earphones are automatically connected to the previously paired smartphone or
   the device, allowing you to use them quickly.

Working Status of the Charging Box

Before first use, please place the earphones in the charging box and connect the TYPE-C cable to charge the charging box and the earphones.

Charging indicator

1. Charge the earphones: Place the earphones in the charging box, close the cover and the earphones will automatically start charging.
   The corresponding (L/R) battery indicators will flash until the earphones are fully charged. When fully charged, the (L/R) battery indicators stop flashing, and the blue indicator lights for 15 seconds and then turn off.

2. Charge the charging box: Plug the charger cable into the TYPE-C interface, and the charger box will automatically start charging. The LED display screen will gradually show 0-100% of the battery status until charging is complete.
   Note: When the earphones are placed in the charging box, please lay them flat and make sure they are in place before closing the cover to avoid poor contact between the headset and the charging probe, which can lead to charging errors or damage to the earphones.

Definition of key operation

Low battery prompt

There would be a reminder of the voice “Battery low, please recharge”
every 20 seconds if the battery was only sufficient for 5 minutes.

Headphone status indicator

Charging indicator of the charging box

During the charging process of the charging box, the Battery status is displayed in a percentage

WARNING

CORRECT  WEARING METHOD

WRONG WEARING METHOD

Basic Parameters

• Size: each (27*23 23mm)
• Weight each (5.5g)
• Bluetooth version: 5.0
• Working frequency: 2.402GHz-2.480GHz
• The battery capacity of the earphones: 50mAh
• The capacity of the charging box battery: 2200mAH
• Charging time of the charging box: 2.5 hours
• Charging time for earplugs: 1.5 hours
• ANC noise suppression band: 20Hz-5KHz
• ANC noise reduction depth: 25dB
• ANC Noise Reduction Category: ANC-FB Feed forward noise reduction
• Music playing time: 5 hours
• Talk time: 5 hours
• Protocols: A2DP1.3, HFP1.7, HSP1.2, AVRCP1.6, SPP1.2
• Communication distance: 10M
• Charging box input: TYPE-C DC 5.oV 1A
• Charging box output: USB A DC 5V 1A
• Display of the charger box battery: LED digital tube
• Working temperature: 10°C-60°C
• Wireless charger: 5V 500mA

Basic Parameters of the speaker

• Speaker specifications: D10mm
• Impedance: 320 t15% at1000Hz
• Frequency: 20Hz-20KHz
• Sensitivity: 110 t2dB
• Input power: conventional 3mW, max. 5mW

Basic parameters of the microphone

• MIC type: Silicone microphone
• MIC sensitivity: -42:1dB
• Total Harmonic Distortion:0.1%

Safety Instructions

To avoid hearing damage, keep the volume at a moderate level and avoid listening to music at high volume for long periods of time, which can cause permanent hearing damage and even deafness.
Please do not use earphones during activities that require attention, such as driving a car, cycling, crossing the street, etc.
Note: If you use earphones while watching videos, the sound may be slightly out of sync with the video.

When charging is complete, please disconnect the charging cable from the unit.
The specified range of the charger output is 5V/1A-5V/1.5A. If the output voltage or current of the charger exceeds the specified range, this will cause serious damage to the product which is not covered by the warranty.

TWS Real Wireless Bluetooth Earphones User Guide and Notes

1. All Bluetooth products can be affected by the environment in which they are used. Please avoid use in large electromagnetic fields or environments with strong radiation, as this will interfere with the Bluetooth signal.
2. if the battery of the earphones is below 10%, the reception power and distance will decrease. It is recommended to use the earphones if they have a sufficient battery and to charge the product regularly.
3. If there are obstacles or multiple 2.4GHz signals, the Bluetooth signal will be disturbed and occasional cadence may occur.
4. Please do not drop the Bluetooth earphones or put them in water as this may damage the speaker, microphone and sound quality.

FCC

NOTE: 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 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

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the 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.

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