2BT4E-4410-1105digital micrometer

2 . According to the measurement requirement, long press ABS / mm / in button to select the measurement unit. 3 . When the measuring range is 0-25 mm and below, turn the ratchet barrel to close the two measuring surfaces of the micrometer, observe the displayed value and check whether the 0 position is correct.If the product exceeds the range of 25 mm, select the measuring calibration bar or block corresponding to the corresponding range, make the measuring surface and the measured surface fit closely, and select the measuring unit.If the product exceeds 2.5 mm range, select the measurin g calibration bar or block corresponding to the corresponding range, make the measuring surface and the measured surface close together, observe the displayed value and check whether the 0 position is correct. When the 0 position of the product is not correct, press the ZERO key to reset the 0 position of the micrometer. 1 . Press the ON / OFF (On/Off) key to illuminate the display. If the display shows "SET", use the appropriate calibration post or block.Make a tight fit between the measuring surface and the surface to be measured, then twist the ratchet barrel so that it clicks three times. Final ly press and hold ON / OFF and it will be set to the corresponding preset 0 position. 4 . Rotate the ratchet barrel or micrometer barrel so that the measuring surface and the surface being measured fit closely together, then twist the ratchet barrel so that the ratchet barrel rattles three times. Then observe the display and read the value. 1 . Without any operation for more than 25 minutes, the screen is automatically off, rotating the sleeve can be turned on; without any operation for more than 72 H, then the systemPower off, you need to press ON / OFF power on, the screen appears "SET" characters, at this tim e, long press "ON / OFF" to reset the 0 position.2 . The product uses CR2450 batteries.3 . Using the supplied 'S' wrench, rotate the battery cover in a counterclockwise direction and remove. Then install the battery with the positive terminal facing up. 1.Anvil 7. LCD screen6. 3.Locking screw Frame 5.Ratchet barrel 2.Spindle 4.Thimble 8 9.Bluetooth . Frame shield For your safety, please ready this manual book before using. Thanks for choosing PEC TOOLS ! Buttons are pressed two ways to execute functions : 2 . Press and hold for at least two seconds 1 . Press and immediately release 2 .Zero Button Press and release : Zero set for absolute measuring Press and release : Absolute and INC measuring mode conversion Press and hold : Inch / Metric conversion ( " in " will appear for inch readings , "mm " will appear for m etric 3 . 4 . Bluetooth ABS / - Unit Button readings Press and release : Power on / off 1 .ON / OFF Button Operating temperature : 0-40°C Storage temperature : -20-60°C Measuring force : 5-10N GENERAL SPECIFICATIONS Use a soft cloth to clean the instrument . Never use organic solvents such as acetone or benzene to clean Do not drop it or apply excessive force Avoid exposing the instrument away from strong magnetic fields and high voltage . Do not disassemble the instrument Do not use or store the instrument under direct sunlight If the instrument is to be stored or left unused for extended periods , remove the battery Do not subject the instrument to blows or shock . Measuring data incorrect 2 . Zero is incorrect 1 . Dirty measuring faces 1 . Clean measuring faces 2 . Inspect and reset zero N o d i s p l a y o n L C D 1 . Bat tery position is incorrect 2 . Battery is dead 1 . Reset battery 2 . Replace with new battery 1 . Flickering display 3 . Display remains dead 2 . Display is sporadic 2 . Replace battery 1 . Replace battery 3 . Reset battery Replace with new battery 3 . Battery position is incorrect 2 . Weak battery 1 . Weak battery Weak battery 2 . Output data is incorrect 1 . Display is blurry S olution ( s ) Cause ( s ) Problem ( s ) 1 2 3945 8 7 6 FUNCTION SYMBOL S TRUCTURE BATTERY USAGE AND INSTALLATION PRODUCT USAGE Precautions INCH measurement Metric measurement Increasing measurement TROUBLE SHOOTING INGESTION HAZARD: This product contains a button cell or coin battery. DEATH or serious injury can occur if ingested. A swallowed button cell or coin battery can cause Internal Chemical Burns in as little as 2 hours. KEEP new and used batteries OUT OF REACH Of CHILDREN Seek immediate medical attention if a battery is suspected to be swallowed or inserted inside any part of the body. WARNING Enable device Bluetooth,Press & hold DATA button 3+ sec until LED blinks fast (1/sec). On device, select "Bluetooth Keyboard" and tap "Pair". When connected, LED blinks slowly. 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…

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Products Engineering Corporation. (March 31, 2026) 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: 2BT4E-4410-1105) (Products Engineering Corporation.) , the undersigned, hereby authorize Products Engineering Corporation. to act as our designated U.S. agent for service of process, (Products Engineering Corporation.) 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. Products Engineering Corporation. accepts the responsibility to act as designated U.S. agent for service of process. Applicant Information ： Company Name: Products Engineering Corporation. Contact Name: June Ao Address: 2645 MARICOPA ST, TORRANCE, CA 90503-5144, United States FRN: 0037834132 Telephone No: +86-15622906535 Email: [email protected] [June Ao] U.S. Agent Information: Company Name: Products Engineering Corporation. Address: 2645 MARICOPA ST, TORRANCE, CA 90503-5144, United States FRN: 0037834132 Contact Name: June Ao Telephone No: +86-15622906535 Email: [email protected] [June Ao]

ProductsEngineeringCorporation. CoveredEquipmentCertificationAttestationLetter 4/1/2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa K1V1H2 Canada ATTN.:ReviewingEngineer FCCID:2BT4E-4410-1105 ProductsEngineeringCorporation.(“theapplicant”)certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. ProductsEngineeringCorporation.(“theapplicant”)certifiesthat,asofthedateofthe filingoftheapplication,theapplicantisnotidentifiedontheCoveredListasanentity producing“covered”equipment. ProductsEngineeringCorporation.(“theapplicant”)certifiesthattheequipmentfor whichauthorizationissoughtdoesnotincludecybersecurityoranti-virussoftware producedorprovidedbyKasperskyLab,Inc.oranyofitssuccessorsandassignees, includingequipmentwithintegratedKasperskyLab,Inc.(oranyofitssuccessorsand assignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:JuneAo Title:SalesManager CompanyName:ProductsEngineeringCorporation. Date:4/1/2026

ProductsEngineeringCorporation. 4/1/2026 NemkoNorthAmerica,Inc. 303RiverRoad Ottawa,Ontario,Canada K1V1H2 REQUESTFORCONFIDENTIALITY-FCC FCCID:2BT4E-4410-1105 PursuanttoSections0.457(d)(1)(ii)and0.459oftheCommission’sRulesandFCCGuidance document726920,weherebyrequestconfidentialtreatmentofinformationaccompanyingthis applicationasoutlinedbelow: PERMANENTLONG-TERMCONFIDENTIALITY: Schematics BlockDiagrams TheoryofOperation Theaboveinformationcontainstradesecretsandproprietaryinformationnotcustomarilyreleasedto thepublic.Thepublicdisclosureofthisinformationmightbeharmfultotheapplicantandprovide unjustifiedbenefitstoitscompetitors.TheApplicantunderstandsthatpursuanttoRule 0.457(d)(1)(ii),disclosureofthisApplicationandallaccompanyingmaterialswillnotbemadebefore thedateoftheGrantforthisApplication. Sincerely, Signed: Printedname:JuneAo Title:SalesManager

FCCID:2BT4E-4410-1105 FCCID:2BT4E-4410-1105 FCCID:2BT4E-4410-1105 FCCID:2BT4E-4410-1105

LabelandLabelLocation

FCCID:2BT4E-4410-1105 FCCID:2BT4E-4410-1105 FCCID:2BT4E-4410-1105 FCCID:2BT4E-4410-1105

Page1of3 RFEXPOSUREEVALUATION FCCID:2BT4E-4410-1105 ProductName:digitalmicrometer Modelname:4410-1105 Specification:BLE Operatingfrequency:2402-2480MHz Modulation:GFSK NumberofChannel:40channels Antennainstallation:PCBAntenna AntennaGain:1.5dBi Powersupply: DC3V Battery:CR2450 HardwareVersion:N/A SoftwareVersion:N/A Page2of3 StandardRequirement Accordingto§15.247(i)and§1.1307b(1),systemsoperatingundertheprovisionsofthis sectionshallbeoperatedinamannerthatensuresthatthepublicisnotexposedtoradio frequencyenergylevelsinexcessoftheCommission’sguidelines.SeeKDB447498D01 GeneralRFExposureGuidancev06,section4.3.1. The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances≤50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]*[√f(GHz)]≤3.0for1-gSARand≤7.5for10-gSARextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison. Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤ 50mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmisappliedtodetermineSARtestexclusion. RoutineSARevaluationreferstothatspecificallyrequiredby§2.1093,usingmeasurements orcomputersimulation.WhenroutineSARevaluationisnotrequired,portabletransmitters withoutputpowergreaterthantheapplicablelowthresholdrequireSARevaluationtoquality forTCBapproval. Page3of3 Channel (MHz) Maximum output power (dBm) Tuneup tolerance (dBm) MaxTune UpPower (mW) Distance (mm) Calculation results Limit Operating Mode 24801.57 1.57±1 1.80717450.5691883BLE AccordingtoKDB447498,nostand-alonerequiredantenna,andnosimultaneousSAR measurementisrequired. Signature SimonPu EMCManager Date:2026-03-31

Day line sex can measuring APPlications ※Bluetooth Home RF ※ISM band 2.4GHz applications 1.Dimensions 2.Specifications number ItemSpecifications 1Working Central Frequency2441 MHz 2Band Width(2402-2480)MHz 3Gain1.5 dBi 4VSWR≤2.0 5Antenna typePCB antenna 6Azimuth Beam width0mni-directional 7Impedance50 ohm 8Modulation modeGFSK Manufacture's name: Shenzhen Haide Zhilian Electronics Co., Ltd. Address: Room 3A22, 4th Floor, Building C, Baoyuan Huafeng Headquarters Economic Building, Xixiang Avenue, Laodong Community, Xixiang Street, Bao'an District, Shenzhen City 3.Instrument testing, software simulation parameters ① VSWR Mkr1:2397MHz 1.47 Mkr2:2450MHz 1.51 Mkr3:2482MHz 1.59 ② Smith Char Mkr1:2397MHz 73.4 Mkr2: 2450MHz 62.7 Mkr3: 2482MHz 66.8 ③ Return Loss Mkr1: 2397MHz -15 Mkr2:2450MHz -18 Mkr3: 2482MHz -16 ④ Smith Char The simulation Mkr1:2400MHz 1.234 Mkr2: 2500MHz 1.051 Mkr3: 2600MHz 1.322 ⑤ Return Loss The simulation Mkr1: 2400MHz -19.59 MHz2: 2450MHz -27.70 MHz3:2500MHz -31.97 MKz4: 2550MHz -21.83 ⑥ Phase The simulation MHz1: 2400MHz -54.89 Mkr2: 2500MHz -82.03 Mkr3: 2600MHz -102.6 4. Radiation Pattems XY-plane XZ-plane YZ-plane 3D Radiation field type

Page1of54 FCCTESTREPORT FCCID:2BT4E-4410-1105 Product: digitalmicrometer ModelName: 4410-1105 Brand:N/A ReportNo.:PTC25120908811E-FC01 Preparedfor ProductsEngineeringCorporation. 2645MARICOPAST,TORRANCE,CA90503-5144,US Preparedby PreciseTesting&CertificationCo.,Ltd Building1,No.6,TongxinRoad,DongchengStreet,Dongguan,Guangdong,China ReportNo.:PTC25120908811E-FC01 Page2of54 1TESTRESULTCERTIFICATION Applicant’sname: ProductsEngineeringCorporation. Address: 2645MARICOPAST,TORRANCE,CA90503-5144,US Manufacture'sname: DASQUATECHNOLOGYLTD. Address: No.99,WestSectionofHupanRoad,ChengduCity,SichuanProvince, China Productname: digitalmicrometer Modelname:4410-1105 Standards:FCCCFR47Part15Section15.247 Testprocedure:ANSIC63.10-2020 TestDate:March05,2026toMarch27,2026 DateofIssue:March31,2026 TestResult:Pass ThisdevicedescribedabovehasbeentestedbyPTC,andthetestresultsshowthatthe equipmentundertest(EUT)isincompliancewiththeFCCrequirements.Anditisapplicableonlyto thetestedsampleidentifiedinthereport. Thisreportshallnotbereproducedexceptinfull,withoutthewrittenapprovalofPTC,thisdocument maybealteredorrevisedbyPTC,personalonly,andshallbenotedintherevisionofthedocument. TestEngineer: Jackzhou/Engineer TechnicalManager: SimonPu/Manager ReportNo.:PTC25120908811E-FC01 Page3of54 Contents Page 1TESTRESULTCERTIFICATION...............................................................................................................................2 2TESTSUMMARY..........................................................................................................................................................5 2.1TESTSITE............................................................................................................................................................6 3GENERALINFORMATION.......................................................................................................................................7 3.1GENERALDESCRIPTIONOFE.U.T.....................................................................................................................7 3.2CHANNELLIST.....................................................................................................................................................8 4EQUIPMENTDURINGTEST....................................................................................................................................9 4.1EQUIPMENTSLIST.............................................................................................................................................9 4.2MEASUREMENTUNCERTAINTY.........................................................................................................................11 4.3DESCRIPTIONOFSUPPORTUNITS...................................................................................................................12 5CONDUCTEDEMISSION..........................................................................................................................................13 5.1E.U.T.OPERATION............................................................................................................................................13 5.2EUTSETUP.......................................................................................................................................................13 5.3TESTSET-UP(BLOCKDIAGRAMOFCONFIGURATION).................................................................................14 5.4MEASUREMENTPROCEDURE............................................................................................................................14 5.5CONDUCTEDEMISSIONLIMIT...........................................................................................................................14 5.6MEASUREMENTRECEIVERPARAMETERS:.......................................................................................................15 5.7CONDUCTEDEMISSIONTESTRESULT.............................................................................................................15 6RADIATEDSPURIOUSEMISSIONS......................................................................................................................16 6.1EUTOPERATION...............................................................................................................................................16 6.2TESTSETUP......................................................................................................................................................17 6.3SPECTRUMANALYZERSETUP..........................................................................................................................18 6.4TESTPROCEDURE.............................................................................................................................................19 6.5SUMMARYOFTESTRESULTS...........................................................................................................................21 7CONDUCTBANDEDGEANDSPURIOUSEMISSIONSMEASUREMENT....................................................28 7.1TESTPROCEDURE.............................................................................................................................................28 7.2TESTSETUP......................................................................................................................................................28 7.3TESTRESULT....................................................................................................................................................29 ReportNo.:PTC25120908811E-FC01 Page4of54 86DBBANDWIDTHMEASUREMENT......................................................................................................................36 TESTPROCEDURE...................................................................................................................................................36 TESTSETUP....................................................................…

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FCCID:2BT4E-4410-1105 RadiatedSpuriousEmissions From30MHz-1000MHz TestfrequencyfromAbove1GHz