User Manual

Operation and Functions

Operation	Function	Comments
Touch the MFB for 3 seconds from OFF state	Power on the earbuds
Touch the MFB for 5 seconds from ON state and when no music is played	Power off the earbuds
Touch the right earbud's MFB	Volume +
Touch the left earbud's MFB	Volume -
Double touch the either earbud's MFB	Play/Pause
Double touch the either earbud’s MFB during incoming call/on a call	Pick up/End call
Touch either earbud's MFB for 1.5sec during incoming call	Reject the call
Touch either earbud's MFB for 2sec when no call	Switch between ANC modes
Triple-touch the right earbud's MFB	Next track
Triple-touch the left earbud's MFB	Previous track
Touch the right earbud’s MFB four times	Trigger voice assistant
Touch the left earbud's MFB four times	Gaming mode on/off
Touch both earbud's MFB five times when NOT connected to device	Factory reset

Firmware Requirements

There should be no clicking sound prompts on touch.
If the earbuds are NOT connected to the device, they should turn off automatically in 15 minutes.
The internal earbuds volume should be 100% from the factory and the earbuds should remember the volume setting they had before turning off/on. The factory reset should return the volume to 100%.
Low battery notifications with sound prompt should be as follows:
- The first notification at ~20% of the battery.
- The second notification at ~10% of the battery.
- The third notification right before the speaker turns off because of low battery. (Total of 3 low battery alerts).
There should be RED LED indication at 5% of the battery. The LED should blink every 5 seconds.
When the ANC and transparency modes are announced, the music volume should go down to about 1-2% so that the sound prompts could be heard.
All ANC models should be synchronized between the earbuds. If one earbud is in transparency mode, and the second earbud is taken from the case, it should also be in transparency mode.
Earbuds should turn ON with ANC ON. After a long touch, they should switch to transparency mode, and then to ANC OFF.

Hardware Requirements

1) Need to change the red/blue LEDs on the earbuds to red/white LEDs.

2) There should be a wireless charging feature for the case (if possible).

3) The capacity of the case battery should be 400mAh as advertised, and the earbuds battery should be 40mAh.

4) There should be NO high-pitched noise when Transparency is ON and the FF ANC mics are covered with hands.

5) The case should have a rubber oil coating.

LEDs Indication on Earbuds

When the earbuds are being turned on, the white LEDs should light up and start blinking, indicating the pairing mode.
When earbuds are connected to the device, the white LEDs should be off.
When earbuds are being turned off, the white LEDs should light up and go off.
When charging, the red LEDs should be ON until fully charged.
When earbuds battery level is 5%, the red LED should blink every 5 seconds until earbuds turn off due to low battery or are placed in the charging case.

EQ Setting

Should be per the attached file.

FCC Warning

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.

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

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 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.