CK11 - Step by Step User Guide


     1. Product overview





    2. Whats in the box?



    3. Basic operations





Power Switch

Power On/Off

Slide to ON/OFF


Pairing mode

Press and hold for 3 second until the LED flashes Blue and Red alternately

Manually re-connect

Press once

Answer/End a call

Press once

Reject a call

Press and hold for 1 second


Double click

Voice control (phone feature)

Press once while CK11 connected to your phone

Volume Up/down

Rotate the MFB to adjust the volume


  4. LED Indicators

LED Indicator

Speakerphone Status

Voice Prompts

Blue LED on 1 second

Power on

"Power On"

Blue LED flash twice every 5 seconds

(Disconnect Bluetooth Device)


The red and blue LED flash alternate

Pairing in progress



Successful Connection


Blue LED flash once every 5 seconds

Standby mode
(Connect Bluetooth Device)


Blue LED flash once every 5 seconds

Play Music


Red LED flash every 5 seconds

Low voltage

 "Battery Low"




Red LED on 1 second

Power off

"Power Off"

Red LED steady on

Charging in progress


Red LED off

Charging completed



   5. “Auto Power On/Off” function

When the power switch is set to “ON”, the “Auto Power On” function is activated.  The device will turn on automatically the next time you open your car door.

”Auto Power off” - when you leave your car and your phone disconnects from the CK-11, it will automatically turn off after about 7 minutes.

The device can be turned off and the “Auto Power On/Off” function disabled by sliding the power switch to “OFF”.


    6. Pairing and connecting

Step 1 Power on CK11 by setting the toggle switch to ON.

Step 2 Press and hold the MFB for 3 seconds to enter pairing mode (Note: On first use the CK11 will automatically enter pairing mode).

Step 3 Turn on Bluetooth on your phone - search for new devices.

Step 4 Select “Avantree CK11”.


Note: Once paired and connected, the next time they will automatically reconnect.


    7. Multi-point: Pairing and connecting 2 phones simultaneously

Step 1 Connect the first phone (instructions above).

Step 2 Press and hold the MFB for 3 seconds to enter pairing mode.

Step 3 Turn on Bluetooth on the second phone and connect with the CK11.

Step 4 Reboot the CK11 by turning it off then on again. Both phones will now be connected to the CK11.


    8. Clear pairing history

You may need to reset the CK11 if it is not working as expected. When reset to its factory default settings, all the paired device information will be erased.

Step 1 Set the CK11 to PAIRING MODE – press and hold the MFB for 3 second until the LED flashes BLUE and RED alternately.

Step 2 Double click the mute button – you will hear 2 beeps indicating a successful reset. Then it will automatically enter pairing mode.


    9. How to charge

When the battery runs low, the LED will flash every 6 seconds. Recharge the CK11 by plugging it into the supplied car charger, USB charger or PC USB port. It normally takes 3 hrs to fully charge the battery. The LED will turn red when charging and turn off when charging is completed.

Charging requirements: DC5.0V/ 500mA-1A.


    10. Product specifications

  • BT Version: 4.2
  • Supported Profiles: A2DP, AVRCP, HSP, HFP
  • Operation Frequency Band: 2.4GHz~2.48GHz unlicensed ISM band
  • Operation Range: Class 2, Up to 30ft.
  • Working Time: 22 hrs
  • Standby Time: 600hrs
  • Charging Time: about 3 hrs
  • Charger Voltage: DC5.0V, 500mA
  • Battery: 650mA, BL-5B, rechargeable lithium-ion battery



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