Superior Call Quality with JustMyVoice™ using an Utterance Detection MEMS Microphone

Ambient Sound Mode

6mm Driver units with PEEK diaphragm

7.5 Hours Playback

Alexa Enabled

Cheaper Bluetooth Ear Phones then the Technics AZ60 but still has utterance detection support

What is in the box

Headphones / Charging Case

USB 'C' Cable

Headphone rubber tips for various ear sizes

User's Manual

Charging Case with headphones

Close up view of headphones

Side View of the Headphones

USB D+ / D- Interface

Power Connections

Light Pipe for light based proximity Detector

Sound input

Location inside for the Utterance Detector

Speaker Sound Port

MEMS Microphones are coupled behind these grids

Views of the Headphone with the rubber ear piece removed

The headphone touch sensor cap is glued onto the headphone. The only way in was to gently used a Xacto knife to break the glue seal

Once a the touch sensor cap gave a little, a Jimmy Tool was used to pry the cap from the headphone body

Since the headphone was easy to open, it may be possible to perform a battery change without damaging the headphone

Once the headphone was open, we get our first look at the inside of the headphone

Bluetooth Radio / MCU

Battery

Before removing the battery, it was unsoldered from the MCU PCB. This was safety measure, so the that the battery could not be accidentally shorted during the teardown. It is recommend to unsolder the battery in any teardown where it is soldered in and not easy to remove to reduce the change of problems

The battery was pried out using a small flathead screw driver

The battery is a Li-ion 3.7V / 0.2Wh or 3.7V / 54mAh

Was not able to the the vendor of the battery. If you happen to know the battery vendor. Please leave it in the comments

There is a a Phillips Head ##00 screw that holds the MCU board in place in the headphone

Removing the MCU screw allows the MCU to be pried out with a small flathead screw driver

With the MCU PCB removed, we can see the Touch Sensor and Bluetooth Antenna Interface Board

MCU PCB

Touch Sensor and Bluetooth Antenna

Battery

The MCU PCB Interfaces to the Touch Sensor and Bluetooth Antenna via pogo pins

The Touch Sensor and Bluetooth Antenna PCB was pried out with a flathead screw driver

The Touch Sensor and Bluetooth Antenna PCB is held in place with double sided foam tape

Pulling off the double sided foam tape, we can see the Touch Sensor and Bluetooth Antenna structure

To release the MCU PCB from the headphone, we can pop the retention clip interfacing the MCU to the headphone via the flex ribbon cable

Pulling the flex cable from the retention chip frees up the MCU board, but the MCU PCB is still attached to the speaker

Now, we pop of the other side of the flex cable from the retention chip, so that we can pry out the Power, USB, and Utterance Detection Microphone PCB

This PCB is also held in place with double side foam tape

Now we can remove the speaker from the headphone. The speaker is held in place with double side foam tape, so it best to use an Xacto knife to cut around the speaker. Then the speaker can be pried out with a small flathead screw driver

Now with the headphone dissembled, we can turn our attention to looking at the components that make up the headphone. We will start with the MCU PCB

AIROHA AB1565M - ARM Cortex M4/Bluetooth 5.2 Dual Mode with Active Noise Cancellation

MEMS Microphone. Not able to cross the part. The part has the following markings: 2C4 1X7. If you happen to know the part, please the part information in the comments

Crystal Oscillator

MEMS Microphone. Not able to cross the part. The part has the following markings: 6C2 1D7. If you happen to know the part, please leave the part information in the comments

Battery Management IC. Part Markings 651DE1M0 13Q0W52C

Could not cross the part. The part has the following markings: SV4CP 2H0. If you happen to know the part, please leave the part information in the comments

Close up view components on the Front Side of MCU PCB

MCU with Bluetooth

AIROHA AB1565M - ARM Cortex M4/Bluetooth 5.2 Dual Mode with Active Noise Cancellation

Close up of the MEMS Microphone

MEMS Microphone. Not able to cross the part. The part has the following markings: 2C4 1X7. If you happen to know the part, please the part information in the comments

Close up view of components on the Backside of MCU with Bluetooth

MEMS Microphone

Not able to cross the part. The part has the following markings: 6C2 1D7. If you happen to know the part, please leave the part information in the comments

Battery Management IC

Part Markings 651DE1M0 13Q0W52C

Could not cross the part. The part has the following markings: SV4CP 2H0. If you happen to know the part, please leave the part information in the comments

We can not turn our attention to the Power, USB, and Utterance Detection Microphone PCB

The part number on this component was not readable, but it location near the power interface may mean that it is either a Diode or PMOS FET

Vesper VA1200 - Analog Piezoelectric MEMS Voice Accelerometer. Bone Sensor - used for Utterance Detection

Light based Proximity Detector. Detects when the microphone is in the ear canal or in the charger

Close up view components on the Front Side of Power, USB, and Utterance Detector PCB

The part number on this component was not readable, but it location near the power interface may mean that it is either a Diode or PMOS FET

Vesper VA1200 - Analog Piezoelectric MEMS Voice Accelerometer. Bone Sensor - used for Utterance Detection

Close up view components on the Backside of the Power, USB, and Utterance Detector PCB

Light based Proximity Detector. Detects when the microphone is in the ear canal or in the charger

Light based Proximity Detector with cover removed. The Transmit and Receiver LEDs can be seen.

Close up view of the front and the side of 6mm Driver (speaker) with PEEK diaphragm

No part number found on component. If you happen to know the component please leave the component information in the comments.

Close up view the Microphone interfaces to the topside [Touch Sensor / Antenna Cap]

MEMS Microphone Interface

MEMS Microphone Interface

Teardown Exploded Top Side and Backside views of the Headphone

This teardown showed that with little effort the batteries in the headphone could be changed out.