2A3O7-B2Kaatsu BFR

Instruction Book KAATSU B2 User Manual The KAATSU B2 is the digital, Bluetooth model of the KAATSU product line. The B1 includes all the features of the KAATSU Cycle and KAATSU Constant modes. It is ideal for tech savvy individuals, data-driven coaches, telemedicine professionals, and first adopters of innovative health tech products. The B2 can be used anywhere anytime; your usage data will be captured and archived for your analysis. The B2 is controlled by an iOS or Android app on your smartphone and can help achievement of performance, rehabilitation and recovery goals for people of all ages, conditions, and walks of life. 1. APP Installation Search "KAATSU B2" APP from Google Play Store and iOS Apple Store then install it. 2. User Registration Input USER information (Name, ID and Password, Age, Gender, Country) USER ID has to be working email address and Password has to be 6 or more characters 3. KAATSU B2 Pairing 1) After user registration, LOG IN again. 1) Turn on both KAATSU B2 Devices (RED LED is ON) 2) Pairable devices will be displayed on the APP then choose "PAIR" BLUE LED is on when the device is paired. 3) Choose "NEXT" 4. Choose Exercise Modes Choose exercise mode "CYCLE" or "CONSTANT" from MAIN MENU 5. Set CYCLE Mode 1 )Choose "FIXED" or "PROGRESS" 2) Choose "ARM" or "LEG" then press "NEXT". 3) Select exercise Level (3 preset levels and Custom level are available) 4) Select number of exercise set. (From 1 to 6 sets) 5) When exercise is done, choose "REPEAT" or "EXIT" 6. Set CONSTANT Mode 1) Choose "CONSTANT" from Main Menu 2) Choose "ARM" or "LEG" 3) Set exercise time (Up to 15 minutes) 4) Set exercise SKU then press "START" 5) When exercise is done, choose "REPEAT" or "EXIT" 7.FCC Statement: 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. This equipment has been tested and found to comply with the limits for aClass B digital device, pursuant to part 15 ofthe FCCRules. Theselimits aredesigned to provide reasonable protection against harmful interference in a residential installation. This equipmentgenerates,usesandcanradiateradiofrequencyenergyand,ifnotinstalled andused inaccordance withthe instructions,may causeharmfulinterferencetoradio communications.However,there isno guaranteethatinterferencewill notoccur ina particularinstallation.Ifthisequipmentdoescauseharmfulinterferencetoradioor 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. Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.Thisequipment complies withFCC radiation exposure limits setforth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or

(Kaatsu Global, Inc) (2023.09.25) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(i) request for (FCC ID: 2A3O7‐B2) [Kaatsu Global, Inc ] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, (Applicant signature) (Applicant printed name) Richard Herstone (Kaatsu Global, Inc) (2023.09.25) Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Attestation Statements Part 2.911(d)(5)(ii) request for (FCC ID: 2A3O7‐B2) [Kaatsu Global, Inc ] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Sincerely, (Applicant signature) (Applicant printed name) Richard Herstone

Attestation Statements (2023.09.25) TO: Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046, USA RE: Attestation Statements Part 2.911(d)(7) request for (FCC ID: 2A3O7‐B2) (Kaatsu Global, Inc) , the undersigned, hereby authorize (Kaatsu Global, Inc) to act as our designated U.S. agent for service of process, (Kaatsu Global, Inc) accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission‐related proceeding involving the equipment. (Kaatsu Global, Inc) accepts the responsibility to act as designated U.S. agent for service of process, provides an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission‐related proceeding involving the equipment. Applicant Information： Company name: Kaatsu Global, Inc Contact Name: Richard Herstone Address: 6506 Morningside Drive Huntington Beach,Huntington Beach,Florida,92648,United States. Telephone No: 7146558886 Email: [email protected] U.S. Agent Information: Company Name: Kaatsu Global, Inc Address: 6506 Morningside Drive Huntington Beach,Huntington Beach,Florida,92648,United States. Contact Name: Richard Herstone Telephone No: 7146558886 Email: [email protected] FRN: 0031645856 Applicant Signature: Agent Signature: (if the agent is different from the applicant) Applicant printed name: Richard Herstone Agent printed name:

Kaatsu Global, Inc Agent Authorization Letter 2023-09-25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Shenzhen Most Technology Service Co., Ltd. to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Name: Richard Herstone Position: COO Company Name: Kaatsu Global, Inc Address: 6506 Morningside Drive Huntington Beach,Huntington Beach,Florida,92648,United States. Tel / Fax 7146558886 /7146558886 E-Mail: [email protected]

Kaatsu Global, Inc Long Term Confidentiality Request Letter 2023-09-25 Eurofins Electrical and Electronic Testing NA, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 USA RE: CONFIDENTIALITY REQUEST FOR (FCC ID: 2A3O7-B2) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - e.g. Block diagram - e.g. SCH - e.g. Operational Description required to be submitted with this application be permanently withheld from public review. The above documents are company proprietary information that could never get into the possession of your competition. Please contact me if there is any information you may need. Sincerely, Name: Richard Herstone Position: COO Company Name: Kaatsu Global, Inc Address: 6506 Morningside Drive Huntington Beach,Huntington Beach,Florida,92648,United States. Tel / Fax 7146558886 /7146558886 E-Mail: [email protected]

Model No.: Kaatsu B2 FRONT VIEW OF SAMPLE BACK VIEW OF SAMPLE Model No.: Kaatsu B2 LEFT VIEW OF SAMPLE RIGHT VIEW OF SAMPLE Model No.: Kaatsu B2 TOP VIEW OF SAMPLE BOTTOM VIEW OF SAMPLE Model No.: Kaatsu B2

Label: Label size:45mm*30mm

Model No.: Kaatsu B2 Page 1 of 4 INTERNAL PHOTO OF SAMPLE INTERNAL PHOTO OF SAMPLE PCB BT Antenna Model No.: Kaatsu B2 Page 2 of 4 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: Kaatsu B2 Page 3 of 4 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: Kaatsu B2 Page 4 of 4

Shenzhen Most Technology Service Co., Ltd. No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. RF Exposure Evaluation Report Report Reference No. ..................... : FCC ID.. .......................................... : MTEB23090176-H 2A3O7-B2 Compiled by ( position+printed name+signature) .. : File administrators Alisa Luo Supervised by ( position+printed name+signature) .. : Test Engineer Sunny Deng Approved by ( position+printed name+signature) .. : Manager Yvette Zhou Date of issue ..................................... : Sep.19,2023 Representative Laboratory Name .: Shenzhen Most Technology Service Co., Ltd. Address ............................................ : No.5, 2nd Langshan Road, North District, Hi-tech Industrial Park, Nanshan, Shenzhen, Guangdong, China. Applicant’s name ............................ : Kaatsu Global, Inc Address ............................................ : 6506 Morningside Drive Huntington Beach,Huntington Beach, Florida,92648,United States. Test specification/ Standard ..........: 47 CFR Part 1.1307 47 CFR Part 2.1093 TRF Originator .................................. : Shenzhen Most Technology Service Co., Ltd. Shenzhen Most Technology Service Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Most Technology Service Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Most Technology Service Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Test item description ..................... : Kaatsu BFR Trade Mark ....................................... : N/A Model/Type reference....................... : Kaatsu B2 Listed Models .................................. : N/A Modulation Type ............................... : GFSK Operation Frequency ........................ : From 2402MHz to 2480MHz Hardware Version .............................. H_V1.1 Software Version ............................... S_V1.7.6 Rating ............................................... : 1:DC 3.7V (by Battery) 2:DC 5V (by USB Port) Result................................................ : PASS Report No.: MTEB23090176-H Page 2 of 5 T E S T R E P O R T Equipment under Test : Kaatsu BFR Model /Type : Kaatsu B2 Listed Models N/A Remark N/A Applicant : Kaatsu Global, Inc Address : 6506 Morningside Drive Huntington Beach,Huntington Beach, Florida,92648,United States. Manufacturer : Techlang Inc. Address : 100-55, Daram-ro, Docheok-myeon, Gwangju-si, Gyeonggi-do, Republic of Korea Test Result: PASS The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: MTEB23090176-H Page 3 of 5 1. Revision History Revision Issue Date Revisions Revised By 00 2023.09.19 Initial Issue Alisa Luo Report No.: MTEB23090176-H Page 4 of 5 2. SAR Evaluation 2.1 RF Exposure Compliance Requirement 2.1.1 Standard Requirement According to KDB447498D01 General RF Exposure Guidance v06 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 Exclusion Threshold condition, listed below, is satisfied. 2.1.2 Limits The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(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 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 distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion Report No.: MTEB23090176-H Page 5 of 5 2.1.3 EUT RF Exposure Measurement Data BLE GFSK Test channel Peak Output Power (dBm) Tune up tolerance (dBm) Maximum tune-up Power (dBm) Lowest(2402MHz) 2.077 2.077±1 3.077 Middle(2440MHz) 1.425 1.425±1 2.425 Highest(2480MHz) 1.148 1.148±1 2.148 Worst case: GFSK Channel Maximum Peak Conducted Output Power (dBm) Maximum tune-up Power Calculated value Exclusion threshold SAR Test Exclusion (dBm) (mW) Highest(2402MHz) 2.077 3.077 2.03 0.63 3.0 Yes .......................THE END OF REPORT.........................

ShenzhenMostTechnologyServiceCo.,Ltd. No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark,Nanshan, Shenzhen,Guangdong,China. TESTREPORT TESTREPORT FCCRulesPart15.247 ReportReferenceNo........................: FCCID................................................: MTEB23090176-R 2A3O7-B2 Compiledby (position+printedname+signature)..:FileadministratorsAlisaLuo Supervisedby (position+printedname+signature)..:TestEngineerSunnyDeng Approvedby (position+printedname+signature)..: ManagerYvetteZhou Dateofissue.........................................:Sep.19,2023 RepresentativeLaboratoryName.:ShenzhenMostTechnologyServiceCo.,Ltd. Address ................................................. : No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark, Nanshan,Shenzhen,Guangdong,China. Applicant’sname...............................:KaatsuGlobal,Inc Address.................................................: 6506MorningsideDriveHuntingtonBeach,HuntingtonBeach, Florida,92648,UnitedStates. Testspecification/Standard............: FCCRulesPart15.247 TRFOriginator ...................................... :ShenzhenMostTechnologyServiceCo.,Ltd. ShenzhenMostTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenMostTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenMostTechnologyServiceCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. Testitemdescription ........................ : KaatsuBFR TradeMark...........................: N/A Manufacturer.........................................: TechlangInc. Model/Typereference.........................: KaatsuB2 ListedModels.....................................:N/A ModulationType..................................:GFSK OperationFrequency .......................... :From2402MHzto2480MHz HardwareVersion ................................. H_V1.1 SoftwareVersion...................................S_V1.7.6 Rating ..................................................... : 1:DC3.7V(byBattery) 2:DC5V(byUSBPort) Result.....................................................:PASS ReportNo.:MTEB23090176-RPage 2 of 38 EquipmentunderTest:KaatsuBFR Model/Type: KaatsuB2 ListedModelsN/A Remark N/A Applicant: KaatsuGlobal,Inc Address: 6506MorningsideDriveHuntingtonBeach,HuntingtonBeach, Florida,92648,UnitedStates. Manufacturer: TechlangInc. Address: 100-55,Daram-ro,Docheok-myeon,Gwangju-si,Gyeonggi-do, RepublicofKorea TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:MTEB23090176-RPage 3 of 38 Contents 1.REVISIONHISTORY................................................................................................................4 2.TESTSTANDARDS...................................................................................................................5 3.SUMMARY......................................................................................................................................6 3.1.GeneralRemarks6 3.2.ProductDescription6 3.3.EquipmentUnderTest6 3.4.ShortdescriptionoftheEquipmentunderTest(EUT)6 3.5.EUToperationmode7 3.6.BlockDiagramofTestSetup7 3.7.TestItem(EquipmentUnderTest)Description*7 3.8.AuxiliaryEquipment(AE)Description7 3.9.AntennaInformation*8 3.10.EUTconfiguration8 3.11.Modifications8 4.TESTENVIRONMENT.............................................................................................................9 4.1.Addressofthetestlaboratory9 4.2.Environmentalconditions9 4.3.TestDescription10 4.4.Statementofthemeasurementuncertainty10 4.5.EquipmentsUsedduringtheTest11 5.TESTCONDITIONSANDRESULTS............................................................................12 5.1.ACPowerConductedEmission12 5.2.RadiatedEmission15 5.3.MaximumPeakOutputPower22 5.4.PowerSpectralDensity23 5.5.6dBBandwidthand99%Bandwidth24 5.6.BandEdgeComplianceofRFEmission25 5.7.SpuriousRFConductedEmission27 5.8.AntennaRequirement28 6.TESTSETUPPHOTOSOFTHEEUT..........................................................................29 7.EXTERNALANDINTERNALPHOTOSOFTHEEUT........................................30 APPENDIXI.ConductedPeakOutputPower31 APPENDIXII.99%Bandwidth32 APPENDIXIII.6dBBandwidth 33 APPENDIXIV.ConductedOutOfBandEmission 34 APPENDIXV.DutyCycle 36 APPENDIXVI.PowerSpectralDensity 38 ReportNo.:MTEB23090176-RPage 4 of 38 1.RevisionHistory RevisionIssueDateRevisionsRevisedBy 002023.09.19InitialIssueAlisaLuo ReportNo.:MTEB23090176-RPage 5 of 38 2.TESTSTANDARDS Thetestswereperformedaccordingtofollowingstandards: Thetestswereperformedaccordingtofollowingstandards: FCCRulesPart15.247:FrequencyHopping,DirectSpreadSpectrumandHybridSystemsthatarein operationwithinthebandsof902-928MHz,2400-2483.5MHz,and5725-5850MHz. ANSIC63.10:2013:AmericanNationalStandardforTestingUnlicensedWirelessDevices ReportNo.:MTEB23090176-RPage 6 of 38 3.SUMMARY 3.1.GeneralRemarks Dateofreceiptoftestsample:2023.09.15 Testingcommencedon:2023.09.15-18 Testingconcludedon:2023.09.19 3.2.ProductDescription ProductName:KaatsuBFR Model/Typereference:KaatsuB2 PowerSupply： 1:DC3.7V(byBattery) 2:DC5V(byUSBPort) TestingsampleID：MTYP02961 Bluetooth: SupportedType:BLE Modulation:GFSK Operationfrequency:2402MHz~2480MHz Channelnumber:40 Channelseparation:2MHz Antennatype: PCBAntenna Antennagain:1.2dBi 3.3.EquipmentUnderTest Powersupplysystemutilised Powersupplyvoltage: ○ 230V/50Hz ○ 120V/60Hz ○ 12VDC ○ 24VDC ● Other(specifiedinblankbelow) 1:DC3.7V(byBattery) 2:DC5V(byUSBPort) 3.4.ShortdescriptionoftheEquipmentunderTest(EUT) ThisisaKaatsuBFRFormoredetails,refertotheuser’smanualoftheEUT. ReportNo.:MTEB23090176-RPage 7 of 38 3.5.EUToperationmode TheApplicantprovidescommunicationtoolssoftwaretocontroltheEUTforstayingincontinuoustransmitting (DutyCyclemorethan98%)andreceivingmodefortesting.Therear…

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Antenna report 1. Antenna photo 2. Test graphics and data 3. Specifications Center frequency 2.45GHz Peak gain 1.2dBi Operation temperature -40 ~ +85 °C Storage temperature -40 ~ +85 °C Azimuth beamwidth Omni-directional Polarization Linear

Model No.: Kaatsu B2 CE TEST SETUP RE TEST SETUP Model No.: Kaatsu B2 RE TEST SETUP