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  <xs:element id="boxl_LIBORMember" abstract="true" name="LIBORMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_ReferenceRateMember" abstract="true" name="ReferenceRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_DebtInstrumentInterestRateReduction" abstract="false" name="DebtInstrumentInterestRateReduction" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_RequiredEBITDACoverageRatio" abstract="false" name="RequiredEBITDACoverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="boxl_RepaymentsOfDebtNotEligibleForPrepaymentPremium" abstract="false" name="RepaymentsOfDebtNotEligibleForPrepaymentPremium" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_DebtInstrumentCovenantComplianceChangeOfControlVotingPowerPercentage" abstract="false" name="DebtInstrumentCovenantComplianceChangeOfControlVotingPowerPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_ExtinguishmentOfDebtPrepaymentPenaltyOrPremiumsAmount" abstract="false" name="ExtinguishmentOfDebtPrepaymentPenaltyOrPremiumsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_DebtInstrumentBasisSpreadOnVariableRateFloor" abstract="false" name="DebtInstrumentBasisSpreadOnVariableRateFloor" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_DebtInstrumentSeniorLeverageRatio" abstract="false" name="DebtInstrumentSeniorLeverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="boxl_ShortTermDebtMaximumBorrowingCapacity" abstract="false" name="ShortTermDebtMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_DebtInstrumentFeePercentage" abstract="false" name="DebtInstrumentFeePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_LineOfCreditFacilityBorrowingBaseIntellectualPropertySublimit" abstract="false" name="LineOfCreditFacilityBorrowingBaseIntellectualPropertySublimit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_PaymentForDebtPrepaymentCostAndAccruedInterest" abstract="false" name="PaymentForDebtPrepaymentCostAndAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_PercentageIncreaseInIssueOfWarrants" abstract="false" name="PercentageIncreaseInIssueOfWarrants" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_ClassOfWarrantOrRightRepricingThresholdTradingDays" abstract="false" name="ClassOfWarrantOrRightRepricingThresholdTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="boxl_FeesPayablePercentage" abstract="false" name="FeesPayablePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_FeesPayableThresholdAmount" abstract="false" name="FeesPayableThresholdAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_SharesIssuanceDiscount" abstract="false" name="SharesIssuanceDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_NumberWarrantsAfterRepricing" abstract="false" name="NumberWarrantsAfterRepricing" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="boxl_MarketValueOfCommonStockOnMeasurementDateMember" abstract="true" name="MarketValueOfCommonStockOnMeasurementDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_IncomeTaxesTable" abstract="true" name="IncomeTaxesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="boxl_IncomeTaxesLineItems" abstract="true" name="IncomeTaxesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="boxl_SeriesBAndSeriesCPreferredStockMember" abstract="true" name="SeriesBAndSeriesCPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_GenesisCollaborationLLCMember" abstract="true" name="GenesisCollaborationLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_SaharaHoldingLimitedMember" abstract="true" name="SaharaHoldingLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_TemporaryEquityStockIssuedDuringPeriodSharesAcquisitions" abstract="false" name="TemporaryEquityStockIssuedDuringPeriodSharesAcquisitions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="boxl_TemporaryEquityConvertibleThresholdPercentageOfStockPriceTrigger" abstract="false" name="TemporaryEquityConvertibleThresholdPercentageOfStockPriceTrigger" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_TemporaryEquityConvertibleThresholdTradingDays" abstract="false" name="TemporaryEquityConvertibleThresholdTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="boxl_TemporaryEquityFairValue" abstract="false" name="TemporaryEquityFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_NumberOfVotesPerShare" abstract="false" name="NumberOfVotesPerShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="boxl_EquityIncentivePlan2014Member" abstract="true" name="EquityIncentivePlan2014Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_EquityIncentivePlan2021Member" abstract="true" name="EquityIncentivePlan2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPlans" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="boxl_WarrantsMember" abstract="true" name="WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_SalesMarketingManagementAndRelatedConsultingServicesMember" abstract="true" name="SalesMarketingManagementAndRelatedConsultingServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_ManagementAgreementMember" abstract="true" name="ManagementAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_MarkElliottMember" abstract="true" name="MarkElliottMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_RelatedPartyTransactionMonthlyFixedPaymentForServices" abstract="false" name="RelatedPartyTransactionMonthlyFixedPaymentForServices" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_RelatedPartyTransactionPercentageOfCommissionOnGrossProfitDerivedOnTotalPurchaseOrderRevenue" abstract="false" name="RelatedPartyTransactionPercentageOfCommissionOnGrossProfitDerivedOnTotalPurchaseOrderRevenue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_TermManagementAgreementPaysAfterTermination" abstract="false" name="TermManagementAgreementPaysAfterTermination" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="boxl_PercentageOfAnnualManagementFeePayableInCash" abstract="false" name="PercentageOfAnnualManagementFeePayableInCash" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="boxl_ManagementFeeExpenseAnnualMaximum" abstract="false" name="ManagementFeeExpenseAnnualMaximum" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_CustomerOneMember" abstract="true" name="CustomerOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_SupplierOneMember" abstract="true" name="SupplierOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_AccountsPayableAndPrepayment" abstract="false" name="AccountsPayableAndPrepayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="boxl_AmericaSegmentMember" abstract="true" name="AmericaSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_EuropeMiddleEastAndAfricaSegmentMember" abstract="true" name="EuropeMiddleEastAndAfricaSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="boxl_GeographicRegionsOtherThanAmericaEuropeMiddleEastAndAfricaSegmentMember" abstract="true" name="GeographicRegionsOtherThanAmericaEuropeMiddleEastAndAfricaSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
