RF Exposure Evaluation 8CC

FCC ID: 2ADK3XO-9672

RF Exposure Info

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FCCID_4427068

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ADK3XO-9672 Report No.: LCS190812001AEA

RF Exposure Evaluation Report

1. Product Information

FCC ID: 2ADK3XO-9672
Product Name Bluetooth Speaker with Wireless Charging
Model Number XO-9672
Power Supply Input: DC 5V
Modulation Type WPT: CW (Continuous Wave)
Frequency Range WPT: 110 – 205 KHz
WPC Operation Frequency 150.0 KHz
Antenna Type WPT: Coil Antenna
Hardware version /
Software version /
Accessories iPhone X
Exposure category General population/uncontrolled environment
EUT Type Production Unit
Device Type Mobile device

2. Evaluation Method

According to KDB447498 D01 General RF Exposure Guidance v06Section 4.3.1 Standalone SAR
test exclusion considerations: “Unless specifically required by the published RF exposure KDB
procedures, standalone 1-g head or body and 10-g extremity SAR evaluation for general population
exposure conditions, by measurement or numerical simulation, is not required when the
corresponding SAR Test Exclusion Threshold condition, listed below, is satisfied. These test exclusion
conditions are based on source-based time-averaged maximum conducted output power of the RF
channel requiring evaluation, adjusted for tune-up tolerance, and the minimum test separation
distance required for the exposure conditions. The minimum test separation distance is determined
by the smallest distance from the antenna and radiating structures or outer surface of the device,
according to the host form factor, exposure conditions and platform requirements, to any part of the
body or extremity of a user or bystander (see 5) of section 4.1). To qualify for SAR test exclusion, the
test separation distances applied must be fully explained and justified by the operating configurations
and exposure conditions of the transmitter and applicable host platform requirements, typically in
the SAR measurement or SAR analysis report, according to the required published RF exposure KDB
procedures. When no other RF exposure testing or reporting is required, a statement of justification
and compliance must be included in the equipment approval, in lieu of the SAR report, to qualify for
the SAR test exclusion. When required, the device specific conditions described in the other
published RF exposure KDB procedures must be satisfied before applying these SAR test exclusion
provisions; for example, handheld PTT two-way radios, handsets, laptops & tablets etc.“
[(max. power of channel, including tune-up tolerance, mW)/ (min. test separation distance, mm)] · [√f
(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where:
• f (GHz) is the RF channel transmit frequency in GHz
• Power and distance are rounded to the nearest mW and mm before calculation
• The result is rounded to one decimal place for comparison
• 3.0 and 7.5 are referred to as the numeric thresholds in the step 2 below
The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and
for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ADK3XO-9672 Report No.: LCS190812001AEA

distance is < 5 mm, a distance of 5 mm according to f) in section 4.1 is applied to determine SAR test
exclusion.

When one of the following test exclusion conditions is satisfied for all combinations of simultaneous
transmission configurations, further equipment approval is not required to incorporate transmitter
modules in host devices that operate in the mixed mobile and portable host platform exposure
conditions. The grantee is responsible for documenting this according to Class I permissive change
requirements. Antennas that qualify for standalone SAR test exclusion must apply the estimated
standalone SAR to determine simultaneous transmission test exclusion.
a) The [∑ of (the highest measured or estimated SAR for each standalone antenna configuration,
adjusted for maximum tune-up tolerance) / 1.6 W/kg] + [∑ of MPE ratios] is ≤ 1.0.
b) The SAR to peak location separation ratios of all simultaneously transmitting antenna pairs
operating in portable device exposure conditions are all ≤ 0.04, and the [∑ of MPE ratios] is ≤
1.0.

3. Evaluation Limit

3.1 Refer evaluation method

ANSI C95.1–1999: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency
Electromagnetic Fields, 3 kHz to 300 GHz.
FCC KDB publication 447498 D01 General RF Exposure Guidance v06: Mobile and Portable Devices RF
Exposure Procedures and Equipment Authorization Policies.
FCC CFR 47 part1 1.1310: Radiofrequency radiation exposure limits.
FCC CFR 47 part2 2.1093: Radiofrequency radiation exposure evaluation: portable devices
3.2 Limit

Limits for Maximum Permissible Exposure (MPE)/Controlled Exposure
Frequency Electric Field Magnetic Field Power Density Averaging Time
Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²) (minute)
Limits for Occupational/Controlled Exposure
0.3-3.0 614 1.63 *100 6
3.0-30 1842/f 4.89/f *900/f2 6
30-300 61.4 0.163 1.0 6
300-1,500 / / f/300 6
1,500-100,000 / / 5 6

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ADK3XO-9672 Report No.: LCS190812001AEA

Limits for Maximum Permissible Exposure (MPE)/Uncontrolled Exposure
Frequency Electric Field Magnetic Field Power Density Averaging Time
Range(MHz) Strength(V/m) Strength(A/m) (mW/cm²) (minute)
Limits for General Population/Uncontrolled Exposure
0.3-1.34 614 1.63 *100 30
1.34-30 824/f 2.19/f *180/f 2
30
30-300 27.5 0.073 0.2 30
300-1,500 / / f/1500 30
1,500-100,000 / / 1.0 30

F=frequency in MHz
*=Plane-wave equivalent power density

According to FCC KDB 680106 D01 Section 3. RF Exposure Requirements clause 3 the Emission-Limits
in the frequency range from 100 KHz to 300 KHz should be assessed versus the limits at 300 KHz in
Table 1 of CFR 47 – Section1.310 as following (measured distance shall be 15cm from the center of
the probe to the edge of the device):
E-Field */* B-Field
Frequency V/m A/m uT
0.3 MHz – 3.0 MHz 614 1.613 2.0
3.0 MHz – 30 MHz 824/f (=27.530MHz) 2.19/f (=0.07330MHz) --

A KDB inquire was required to determine/confirm the applicable limits below 100 KHz.

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ADK3XO-9672 Report No.: LCS190812001AEA

6.1.2 Equipment Approval Considerations

The EUT does comply with item 5.2 of KDB 680106 D01v02 as follows table;
Requirements of KDB 680106 D01 Yes / No Description
The device operate in the frequency range
Power transfer frequency is less than 1 MHz Yes
110.0 KHz - 205.0 KHz
Output power from each primary coil is less The maximum output power of the
Yes
than 15 watts primary coil is less than 15W.
The transfer system includes only single primary
The transfer system includes one primary
and secondary coils. This includes charging
coils and clients that are able to detect and
systems that may have multiple primary coils Yes
allow coupling only between individual
and clients that are able to detect and allow
pairs of coils.
coupling only between individual pairs of coils.
Client device is placed directly in contact with Client device is placed directly in contact
Yes
the transmitter. with the transmitter.
Mobile exposure conditions only (portable
exposure conditions are not covered by this Yes Mobile exposure conditions only
exclusion).
The aggregate H-field strengths at 15 cm The aggregate H-field strengths at 15 cm
surrounding the device and 20 cm above the top surrounding the device and 20 cm above
surface from all simultaneous transmitting coils Yes the top surface from all simultaneous
are demonstrated to be less than 50% of the transmitting coils are less than 50% the
MPE limit. MPE limit.

In all other cases, unless excluded above, an RF exposure evaluation report must be reviewed and
accepted through a KDB or PBA inquiry to enable authorization of the equipment. When evaluation is
required to show compliance; for example, using field strength, power density, SAR measurements or
computational modeling etc., the specific authorization requirements will be determined based on the
results of the RF exposure evaluation.

6.1.3 E and H field Strength

Operate mode:
Test Modes:
TM1 AC/DC Adapter + EUT + Electric Silicone Cleansing Instrument (Battery Status: <1%) Record
TM2 AC/DC Adapter + EUT + Electric Silicone Cleansing Instrument (Battery Status: <50%) Pre-tested
TM3 AC/DC Adapter + EUT + Electric Silicone Cleansing Instrument (Battery Status: 100%) Pre-tested
TM4 EUT + Electric Silicone Cleansing Instrument (Battery Status: <1%) Record
TM5 EUT + Electric Silicone Cleansing Instrument (Battery Status: <50%) Pre-tested
TM6 EUT + Electric Silicone Cleansing Instrument (Battery Status: 100%) Pre-tested
Note: All test modes were pre-tested, but we only recorded the worst case in this report.

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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ADK3XO-9672 Report No.: LCS190812001AEA

E-Field Strength at 15 cm from the edges surrounding the EUT and 15cm from the top surface of the EUT
Measured E-Field Strength Values (V/m) FCC E-Field
Charging Frequency FCC E-Field
Operate Test Test Test Test Test Strength
Battery Range Strength
mode Position Position Position Position Position 50% Limits
Level (MHz) Limits(V/m)
A B C D E (V/m)
1% 0.150 5.83 5.17 5.52 5.33 6.42 307.0 614.0
TM1 50% 0.150 5.48 5.25 5.46 4.67 5.65 307.0 614.0
99% 0.150 5.37 4.61 5.38 4.59 5.72 307.0 614.0
1% 0.150 5.57 5.38 5.74 5.42 6.62 307.0 614.0
TM4 50% 0.150 5.48 5.29 5.61 5.14 5.78 307.0 614.0
99% 0.150 5.27 5.67 5.15 4.96 5.54 307.0 614.0

H-Field Strength at 15 cm from the edges surrounding the EUT and 15cm from the top surface of the EUT
Measured H-Field Strength Values (A/m) FCC FCC
Charging Frequency H-Field H-Field
Operate Test Test Test Test Test
Battery Range Strength Strength
mode Position Position Position Position Position
Level (MHz) 50% Limits Limits
A B C D E
(A/m) (A/m)
1% 0.150 0.107 0.092 0.106 0.114 0.123 0.815 1.63
TM1 50% 0.150 0.096 0.094 0.103 0.096 0.128 0.815 1.63
99% 0.150 0.081 0.085 0.074 0.078 0.113 0.815 1.63
1% 0.150 0.109 0.092 0.112 0.113 0.155 0.815 1.63
TM4 50% 0.150 0.104 0.089 0.104 0.103 0.164 0.815 1.63
99% 0.150 0.092 0.079 0.076 0.084 0.132 0.815 1.63

H-Field Strength at 20cm from the top surface of the EUT
Measured H-Field Strength FCC H-Field FCC H-Field
Operate Charging Frequency Range
Values (A/m) Strength 50% Strength Limits
mode Battery Level (MHz)
Test Position E Limits (A/m) (A/m)
1% 0.150 0.097 0.815 1.63
TM1 50% 0.150 0.092 0.815 1.63
99% 0.150 0.088 0.815 1.63
1% 0.150 0.097 0.815 1.63
TM4 50% 0.150 0.112 0.815 1.63
99% 0.150 0.083 0.815 1.63

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This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2ADK3XO-9672 Report No.: LCS190812001AEA

Revision History

Revision Issue Date Revisions Revised By
000 Aug 27, 2019 Initial Issue Gavin Liang

.........................END OF REPORT.........................

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This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd.
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Document Created: 2019-09-03 15:48:02
Document Modified: 2019-09-03 15:48:02

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