2A874-PORTABLEForce Board Portable

Force Board User Guide In the Package Force Board Portable Strain Gauge Micro USB Charging Cable Step 1: Charge the Force Board Plug the Force Board into a USB charge plug using the USB cable. • The device is charging when the RED LED is blinking • The device has a full charge when the GREEN LED is constantly on Step 2: Turn on the Force Board Click the black slider switch to the ON position. Step 3: Use the Force Board Open the Force Board app on your mobile phone, define a workout, then perform the workout. The device will communicate with the app using Bluetooth BLE. 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. Any 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. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction

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1/1 Offic Fed e 7435 Colum Subj e FCC To W Purs u (47C attac Abo v cons discl o comp It is corr e docu equip Sinc e Signa Nam Title: e of Engine eral Commu 5 Oakland M mbia, MD 2 ect: Reques ID:2A874-P Whom It May uant to th CFR0.457, 0 chment(s) a ve mentione idered as osure of ab petitor an u our under s espondent d uments and pment auth erely, ature: e: Matt Cu : N/A eering Techn nications Co Mills Road 21046 st for Confid PORTABLE y Concern, he provisio 0.459), we as confident Exhibits ID Label/Loca Attestation St External Photo Block Diagram Schematics Test Report Test Setup Ph User’s Manua Internal Photo Parts List / Tu RF Exposure I Operational D Cover Letter(s SDR Software ed docume proprietar y bove docum nfair advan standing th during cert those infor orization is upal <P nology ommission dentiality ns of Sec t are reques tial docume ation tatement os m hotos l os une Up Info Description s) e / Security Inf nt contains y informatio ments migh ntage in the hat all mea tification rev rmation wil issued. PitchSix, LL tions 0.457 sting the C nt from pub Lon Co n fo s detailed s on in oper ht be harm market. surement t view proce l be availab LC> 7 and 0.4 Commission blic disclosu g-Term nfidentiality S C No No No No No No system and ration of th mful to our test reports ess cannot ble for publ C5 D 59 of Com to withho ure. Short-Term Confidentiality No No No No No equipment he equipm company s, FCC ID la be granted ic review o 266091_X10 Date: 2022-1 mmission's old the follo y t descriptio ent. The p and would abel format d as confid nce the gr a 0_Ed.1 11-02 rules owing n are public give t and ential ant of

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Labelandlabellocation PitchSix,LLC FCCID:2A874-PORTABLE

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FCCID:2A874-PORTABLE RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093， UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone 1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposure conditions,bymeasurementornumericalsimulation,isnotrequiredwhenthe correspondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-gSARtest exclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f (GHz) ]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f (GHz) istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Here, ForBLE MaxPower(dBm)MaxPower(mW)Frequency(MHz)Min.distance(mm)Calc.thresholdslimit 0.2901.07 24025 0.33137 3.0 SoaSARtestisnotrequired

ProjectNo.:ZKT-2210147613E Page 1 of 38 FCCTESTREPORT FCCID:2A874-PORTABLE ReportNumber.....................................: ZKT-2210147613E DateofTest.......................................................: Oct.14,2022-Oct.19,2022 Dateofissue.........................................: Oct.19,2022 Totalnumberofpages .......................... 38 TestResult .......................................... : PASS TestingLaboratory. ........................... : ShenzhenZKTTechnologyCo.,Ltd. Address...............................................: 1/F,No.101,BuildingB,No.6,TangweiCommunityIndustrial Avenue,FuhaiStreet,Bao'anDistrict,Shenzhen,China Applicant'sname.............................: PitchSix,LLC Address...............................................:1796CountryClubDr.,Logan,UT84321USA Manufacturer'sname ...................... : DongguanTopwellTechnologyCo.,LTD Address ............................................... : C1/3F,Building,ChongguangIndustrialPark,Huangdong Village,FenggangTown,DongguanCity Testspecification: Standard................................................: FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10:2013 Testprocedure ..................................... : / Non-standardtestmethod ................ :N/A TestReportFormNo........................: TRF-EL-111_V0 TestReportForm(s)Originator.....: ZKTTesting MasterTRF........................................: Dated:2020-01-06 ThisdevicedescribedabovehasbeentestedbyZKT,andthetestresultsshowthattheequipmentunder test(EUT)isincompliancewiththeFCCrequirements.Anditisapplicableonlytothetestedsample identifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofZKT,thisdocumentmay bealteredorrevisedbyZKT,personalonly,andshallbenotedintherevisionofthedocument. Productname.....................................:ForceBoardPortable Trademark...........................................: Model/Typereference......................: Portable Ratings..................................................: Input:DC5VorDC3.7VBattery ProjectNo.:ZKT-2210147613E Page 2 of 38 Testingprocedureandtestinglocation: TestingLaboratory.......................................:ShenzhenZKTTechnologyCo.,Ltd. Address............................................................:1/F,No.101,BuildingB,No.6,TangweiCommunity IndustrialAvenue,FuhaiStreet,Bao'anDistrict, Shenzhen,China JimLiu Testedby(name+signature).......................: TomZou Reviewer(name+signature).......................: LakeXie Approved(name+signature).......................: ProjectNo.:ZKT-2210147613E Page 3 of 38 TableofContents Page 1.VERSION5 2.SUMMARYOFTESTRESULTS6 2.1TESTFACILITY7 2.2MEASUREMENTUNCERTAINTY7 3.GENERALINFORMATION8 3.1GENERALDESCRIPTIONOFEUT8 3.2DESCRIPTIONOFTESTMODES9 3.3BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED9 3.4DESCRIPTIONOFSUPPORTUNITS(CONDUCTEDMODE)10 3.5EQUIPMENTSLISTFORALLTESTITEMS11 4.EMCEMISSIONTEST12 4.1CONDUCTEDEMISSIONMEASUREMENT12 4.1.11POWERLINECONDUCTEDEMISSIONLIMITS12 4.1.2TESTPROCEDURE12 4.1.3DEVIATIONFROMTESTSTANDARD13 4.1.4TESTSETUP13 4.1.5EUTOPERATINGCONDITIONS13 4.1.6TESTRESULTS13 4.2RADIATEDEMISSIONMEASUREMENT14 4.2.1RADIATEDEMISSIONLIMITS16 4.2.2TESTPROCEDURE17 4.2.3DEVIATIONFROMTESTSTANDARD17 4.2.4TESTSETUP17 4.2.5EUTOPERATINGCONDITIONS18 5.RADIATEDBANDEMISSIONMEASUREMENT23 5.1TESTREQUIREMENT:23 5.2TESTPROCEDURE23 5.3DEVIATIONFROMTESTSTANDARD23 5.4TESTSETUP24 5.5EUTOPERATINGCONDITIONS24 5.6TESTRESULT25 6.POWERSPECTRALDENSITYTEST26 6.1APPLIEDPROCEDURES/LIMIT26 6.2TESTPROCEDURE26 6.3DEVIATIONFROMSTANDARD26 6.4TESTSETUP26 ProjectNo.:ZKT-2210147613E Page 4 of 38 TableofContentsPage 6.5EUTOPERATIONCONDITIONS26 6.6TESTRESULTS27 7.CHANNELBANDWIDTH29 7.1APPLIEDPROCEDURES/LIMIT29 7.2TESTPROCEDURE29 7.3DEVIATIONFROMSTANDARD29 7.4TESTSETUP29 7.5EUTOPERATIONCONDITIONS29 7.6TESTRESULTS30 8.PEAKOUTPUTPOWERTEST32 8.1APPLIEDPROCEDURES/LIMIT32 8.2TESTPROCEDURE32 8.3DEVIATIONFROMSTANDARD32 8.4TESTSETUP32 8.5EUTOPERATIONCONDITIONS32 8.6TESTRESULTS33 9.CONDUCTEDBANDEDGEANDSPURIOUSEMISSION34 9.1APPLICABLESTANDARD34 9.2TESTPROCEDURE34 9.3DEVIATIONFROMSTANDARD34 9.4TESTSETUP34 9.5EUTOPERATIONCONDITIONS34 10.ANTENNAREQUIREMENT37 11.TESTSETUPPHOTO38 12.EUTCONSTRUCTIONALDETAILS38 ProjectNo.:ZKT-2210147613E Page 5 of 38 1.VERSION ReportNo.VersionDescriptionApproved ZKT-2210147613ERev.01InitialissueofreportOct.19,2022 ProjectNo.:ZKT-2210147613E Page 6 of 38 2.SUMMARYOFTESTRESULTS Testproceduresaccordingtothetechnicalstandards: FCCPart15(15.247),SubpartC Standard Section TestItemJudgmentRemark FCCpart15.203/15.247 (c) AntennarequirementPASS FCCpart15.207ACPowerLineConductedEmissionPASS FCCpart15.247(b)(3)ConductedPeakOutputPowerPASS FCCpart15.247(a)(2)ChannelBandwidth&99%OCBPASS FCCpart15.247(e)PowerSpectralDensityPASS FCCpart15.247(d)BandEdgePASS FCCpart15.205/15.209SpuriousEmissionPASS NOTE: (1)“N/A”denotestestisnotapplicableinthisTestReport ProjectNo.:ZKT-2210147613E Page 7 of 38 2.1TESTFACILITY ShenzhenZKTTechnologyCo.,Ltd. Add.:1/F,No.101,BuildingB,No.6,TangweiCommunityIndustrialAvenue,FuhaiStreet,Bao'an District,Shenzhen,China FCCTestFirmRegistrationNumber:692225 DesignationNumber:CN1299 ICRegisteredNo.:27033 2.2MEASUREMENTUNCERTAINTY Thereporteduncertaintyofmeasurementy±U ， whereexpendeduncertaintyUisbasedonastandard uncertaintymultipliedbyacoveragefactorofk=2 ， providingalevelofconfidenceofapproximately95 % 。 No.ItemUncertainty 1 3mcamberRadiatedspurious emission(9KHz-30MHz) U=4.5dB 2 3mcamberRadiatedspurious emission(30MHz-1GHz) U=4.8dB 3 3mchamberRadiatedspurious emission(1GHz-6GHz) U=4.9dB 4 3mchamberRadiatedspurious emission(6GHz-40GHz) U=5.0dB 5ConducteddisturbanceU=3.2dB 6RFBandEdgeU=1.68dB 7RFpowerconductedU=1.86dB 8RFconductedSpuriousEmissionU=2.2dB 9RFOccupiedBandwidthU=1.8dB 10RFPowerSpectralDensityU=1.75dB 11humidityuncertaintyU=5.3% 12Temperatureuncertainty U=0.59 °C ProjectNo.:ZKT-2210147613E Page 8 of 38 3.GENERALINFORMATION 3.1GENERALDESCRIPTIONOFEUT ProductName: ForceBoardPortable ModelNo.: Portable ModelDifferent.:…

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PCBAntenna“MIFA” Typicalantennaspecifications: FrequencyRange(GHz) 2.4~2.5 Impedance(Ω) 50 Gain(dBi)1.5±0.35 Power(mW)0.35 TemperatureRange(°C) -20~+85 FormoreinformationrefertoNordicSemiconductornRF52832datasheet. https://infocenter.nordicsemi.com/pdf/nRF52832_PS_v1.8.pdf ThenRF52832radioblockdiagramisshownbelow. TheantennausedintheproductissimilartotheEspressifESP32tunedto2.4GHz,thedimensionsarelistedaccordingto thefiguresbelow. Antennalayoutandmatchingnetwork: Plotsofthesimulatedantennamodel: Actualmeasurement:

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