K9 True Wireless Stereo Earphones User Manual

True Wireless Stereo Earphones
User Manual

Welcome,
Thank you for purchasing k9 true wireless stereo Bluetooth earphones. K9 earphones can be used with Bluetooth electronic products, such as mobile phones, smartwatches, computers, etc. Please take some time to read our user manual carefully and start your music journey with our earphones.

PAIRING

Open the charging box and take out both two earphones, The earphones will turn on automatically and enter pairing mode after 5s. You will hear a voice prompt “beep” on L/R earphones sometime after being paired successfully.
Turn your Bluetooth device on and search K9 ” to connect, you will hear the voice prompt “connected”. Let’s start the music journey now!

Function instructions

CHARGING

Earphones: Put the earbuds into the charging case, the indicator lights are flashing and it will charge the earbuds automatically after you close the charging case
Warm Reminders:

1. If the earbuds do not connect to each other when you take the earbuds out of the charging case and you will see the red LED light of the two earbuds will flash slowly
2. After the earbuds are paired, the main earbud is flashing quickly, but the secondary earbud doesn’t flash
3. If the LED lights do not flash, this means that both earbuds have connected to your mobile device successfully
4. Put in or take the earbuds out of the charging case, and the LED light will flash, which means the earbuds have connected to the charging case successfully, and charging has begun after you close the charging case

Charging Case: The charging case is connected to the Type-C and yellow light will flash to indicate charging has begun

Chipset introduction

Earphones type: TWS Bluetooth earphones
Bluetooth chipset: 32-bit RISC CPU 6976D
Bluetooth protocol: a2dp \ avctp \ avdtp \ avrcp \ hfp \ spp \ SMP \ att \ gap \ GATT \ rfcomm SDP I2cap
Bluetooth version: V5.0+EDR.BLE
Radiofrequency power class: class2 and olyss3
Transmission distance: z10M
Charging port type: Type-C
Operating voltage: 3.7V
Charging current: charging box 200mAh, earphone 30mAh
Charging time: charging box 52 hours, earphones 51.5 hours
Battery capacity: charging box 400mAh+ earphone 40mAh2
Call duration: 4-5 hours,
Music playing duration: 5-6 hours,
Battery cycle life: charge and discharge cycles “00
Times standby duration: 60 hours
Microphone type: MEMS silicon wheat
Microphone: Dual mic (left/right)
Sensitivity:- 38db ±3db (DB = 1v/pa @ 1khz)
Sound output mode: backward sound
SNR: 63dB
Distortion THD : less than 0.15%94db SPL@1khz
Impedance: 2000
Speaker type: Double composite membrane micro speaker
Drive: Φi3mm, N45
Neodymium magnet Sensitivity: 103db (±3db)@ 1khz.126mV
Impedance: 320
Frequency response: 20hz-20KHz
Rated power: 3mW
Charging box size: 492754mm
Earphone size: 2018*36mm

Function instructions
K9 earphones support master & deputy earphones switching freely, It means you could use each earphone independently, Power off anyone earphone of them won’t affect another earphone’s use. When one earphone battery is low or you only want to wear one earphone, you could power off one earphone of them or put it into a charging box. Just pick it up from the charging box, the earphone can connect to another earphone quickly once you wanna use them together.

Indicator light introduction

deputy earphone indicator light is off.
connected device
Successfully| Both L/R earphones led indicators are off.
Low battery| Red light flashes slowly
Left earphone charging| The left number on the LED digital screen flash
Right earphone charging| The right number on the LED digital screen flash
Charging box charging| The LED digital display screen numb flash
Whether Pairing successed|

If Pairing failed, you will find 2 K9 pairing names in your device, you need to put 2 earphones into the charging box again, close the charging box flip cover, then open the charging box flip cover again waits for 5s, and you will find only 1 K9 pairing name in your device now, Re-connect your device is ok.

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Confirm if both earphones are turned on|

If only one earphone can hear the sound, please check whether both earphones are powered on normally. It is possible that another earphone is under a low battery or power-off status. Please recharge the earphone, then turn them on is ok. You could pick up the earphone from the charging box and power them on automatically or long-touch switch until the earphones power on.

Confirm the charging box whether have power| When the charging box is under few batteries or has no battery situation, it can’t recognize the earphone after you put the earphone into the charging box, it caused the earphones still working.
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Check the earphone charging point whether covered by other things.|

If the earphone’s charging point is covered by other things, it caused the charging box can’t charge the earphones. Please try to remove it or use an alcohol wipe to clean it and try charging again.

FCC Statement
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.

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.
RF Exposure Information
The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure conditions without restriction.

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