NINGBO V25F-TWS Wireless Headphones Module User Guide

NINGBO V25F-TWS Wireless Headphones Module User Guide

Product introduction

1. support a variety of audio formats: MP3, WMA(double decoding), WAV2, Support BT, USB, AUX function is optional
2. IR infrared function
3. Bluetooth BDR+EDR
4. support U disk fast upgrade program
5. signal to noise ratio SNR can reach 99DB
6. Bluetooth can be used in a single machine, and any two machines can also realizethe TWS function against the box
7. support DACL mixed output and DACL DACR stereo output
8. Support button function, through different resistors under the ground can beconnected to a maximum of 5 keys

Product schematic diagram

*Front (3021mm)**

List of applicable FCC rules：FCC Part15 Subpart C, Section 15.247.

1. support a variety of audio formats: MP3, WMA(double decoding), WAV2, Support BT, USB, AUX function is optional
2. IR infrared function
3. Bluetooth BDR+EDR
4. support U disk fast upgrade program
5. signal to noise ratio SNR can reach 99DB
6. Bluetooth can be used in a single machine, and any two machines can alsorealize the TWS function against the box
7. support DACL mixed output and DACL DACR stereo output
8. Support button function, through different resistors under the ground can beconnected to a maximum of 5 keys

Because the module has shielding cover,it is a unrestricted module.

Not applicable. The module has its own antenna, and doesn’t need a traceantenna etc.

RF exposure considerations This equipment complies with FCC radiationexposure limits set forth for an uncontrolled environment.The device can beused in portable exposure condition without restriction.
This transmitter must not be co-located or operating inconjunctionwith any other antenna or transmitter.

Antenna Type:PCB Antenna
Antenna Gain(Peak): 1.7dbi

The final end product must be labeled in a visible area with the following: “Contains FCC ID: 2BARL-V25F “. Information that must be placed in the end user manual:

The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.

Operation Frequency: 2402~2480MHz
Number of Channel: 79 Channels
Modulation: GFSK, π/4-DQPSK
Host manufacturer must perfom test of radiated & conducted emission andspurious emission,etc according to the actual test modes for a stand- alonemodular transmitter in a host.Only when all the test results of test modes comply with FCC requirements, then the end product can be sold legally.

Additional testing Part15SubpartB disclaimer

The grantee should include a statement that the modular transmitter is onlyFCC authorized forthe specific rule parts (i.e.，FCC transmitter rules )listedonthegrant， and that the host productmanufacturer is responsible for compliance to any other FCC rules that apply to the host notcoveredbythemodular transmitter grant of certification .If the grantee markets their product asbeing Part 15SubpartBcompliant( when it also contains unintentional – radiator digital circuit y)， then the grantee shall provide a notice statingthat the final host product still requires Part 15 Subpart B compliance testingwiththe modular transmitter installed .

Federal Communication Commission Statement (FCC, U.S.)
This equipment has been tested and found to comply with the limits for aClassB digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference inaresidential installation. This equipment generates, uses and can radiateradiofrequency 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 andon, the user is encouraged to try to correct the interference by one of thefollowing 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 fromthat towhich the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

This device complies with Part 15 of the FCC Rules. Operation is subject tothefollowing two conditions:
This device may not cause harmful interference, and this device must accept any interference received, including interferencethat may cause undesired operation.

FCC Caution:
Any changes or modifications not expressly approved by the party responsiblefor compliance could void the user’s authority to operate this equipment.

Integration instructions for host product manufacturers according to KDB 996369 D03 OEMManual v01

List of applicable FCC rules
This module comply with the FCC Part15.247 for Modular Approval.

Specific operational use conditions

1. support a variety of audio formats: MP3, WMA(double decoding), WAV
2. Support BT, USB, AUX function is optional
3. IR infrared function
4. Bluetooth BDR+EDR
5. support U disk fast upgrade program
6. signal to noise ratio SNR can reach 99DB
7. Bluetooth can be used in a single machine, and any two machines can also realize the TWSfunction against the box
8. support DACL mixed output and DACL DACR stereo output
9. Support button function, through different resistors under the ground can be connected to a maximum of 5 keys

Limited module procedures
Not applicable. This module is a single module

Trace antenna designs
Not applicable. There is no trace antenna on the module.

RF exposure considerations
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.The device can be used in portable exposure condition without restriction.

Antennas
The EUT has a 1.7dBi PCB Antenna.

Label and compliance information
FCC ID: 2BARL-V25F

The final end product must be labeled in a visible area with the following: “Contains FCC ID: 2BARLV25F”. Information that must be placed in the end user manual:

The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. Theend user manual shall include all required regulatory information/warning as shown in this manual.

The module is not applicable for Limited module procedures. The module is a Single module andcomplies with the requirement of FCC Part 15.247

Warning: Changes or modifications not expressly approved by the party responsible for compliancecould 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 protectionagainst harmful interference in a residential installation. This equipment generates, uses and canradiate radio frequency energy and, if not installed and used in accordance with the instructions, maycause harmful interference to radio communications. However, there is no guarantee that interferencewill 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.

Information on test modes and additional testing requirements
To investigate the maximum EMI emission characteristics generates from EUT, the test systemwasprescanning tested base on the consideration of following EUT operation mode or test configurationmode which possible have effect on EMI emission level. Each of these EUT operation mode(s) or test configuration mode(s) mentioned above was evaluated respectively. RADIATED EMISSIONTEST(BELOW 1GHz):

Pre-Scan has been conducted to determine the worst-case mode from all possible combinations between available modulations, data rates, XYZ axis and antenna ports (if EUT with antenna diversityarchitecture).

For the test results, only the worst case was shown in test report.

RADIATED EMISSION TEST (ABOVE 1GHz):
Pre-Scan has been conducted to determine the worst-case mode from all possible combinations between available modulations, data rates, XYZ axis and antenna ports (if EUT with antenna diversityarchitecture).

Additional testing, Part 15 Subpart B disclaimer
The grantee should include a statement that the modular transmitter is only FCC authorized for thespecific rule parts (i.e., FCC transmitter rules) listed on the grant, and that the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not coveredby the modular transmitter grant of certification. If the grantee markets their product as being Part 15Subpart B compliant (when it also contains unintentional-radiator digital circuity), then the granteeshall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testingwith the modular transmitter installed.

Compliance of this device in all final host configurations is the responsibility of the Grantee. OEMintegrators and end-users must be provided with specific operating instructions for satisfying RFexposure compliance. OEM integrators are instructed to ensure that the end user has no manual instructions to remove or install the device.

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