2ARBY-LV450SLevoit VeSync OasisMistTM Smart Humidifier

OasisMist™ Smart Humidifier Model: LUH-O451S-WUS Questions or Concerns? Please contact us Mon–Fri, 9:00 am–5:00 pm PST/PDT at [email protected] or at (888) 726-8520. USER MANUAL 2 Table of Contents Package Contents Specifications Safety Information Getting to Know Your Smart Humidifier Controls Getting Started VeSync App Setup Using Your Smart Humidifier Care & Maintenance Troubleshooting VeSync App Troubleshooting Warranty Information Customer Support 1 × Smart Humidifier 1 × Cleaning Brush 3 × Aroma Pad (1 Pre-Installed) 3 × Absorption Pad (1 Pre-Installed) 2 × Water Filter Sponge (1 Pre-Installed) 1 × User Manual 1 × Quick Start Guide 2 2 3 5 7 8 10 11 15 20 23 25 26 Specifications Package Contents Power SupplyAC 120V, 60Hz Rated Power280W Water Tank Capacity 1.19 gal / 4.5 L Max Cool Mist Output 300 mL/h Max Warm Mist Output 550 mL/h Max Runtime 45 hours on low mist setting Note: The humidifier may run for a longer or shorter time depending on the environmental temperature and humidity. Noise Level Lowest: < 26dB (Low Cool Mist) Highest: < 41dB (High Warm Mist) Effective Range 215–430 ft² / 20–40 m² Dimensions 10.8 x 6.0 x 11.97 in / 27.4 x 15.2 x 30.4 cm Weight5.3 lb / 2.4 kg Note: To access additional smart humidifier functions, download the free VeSync app (see page 10). 3 SAFETY INFORMATION • Only use the humidifier as described in this manual. • Place the humidifier and cord so that it will not be knocked over. Do not place near large pieces of furniture or in high-traffic areas. • When not in use, turn the humidifier off and disconnect from power by removing the plug from the outlet. • Do not use the humidifier in wet environments. • Keep the humidifier out of reach from children. • Do not open the base or remove the water level sensor for self-servicing. • Always unplug your humidifier from the power outlet before cleaning your humidifier or detaching the water tank from the humidifier base. • Always make sure to place the humidifier on a flat, level surface before operation. • Only fill the water tank with clean water. Never fill the water tank with any other liquids. • Do not place the humidifier near sources of heat, such as stovetops, ovens, or radiators. • Do not place the humidifier directly on floors, carpets, or rugs. • Do not use other items as replacement parts for this product. To reduce the risk of fire, electric shock, or other injury, follow all instructions and safety guidelines. General Safety • Do not cover the nozzles while the humidifier is on. Doing so may damage the humidifier. • Remove the water tank from the base before moving the humidifier. • Do not immerse the humidifier base, power cord, or plug in water. • Do not clean the humidifier immediately after turning it off, especially if it has been diffusing warm mist. Allow the humidifier to cool down completely before cleaning. • If the humidifier is damaged or is not functioning properly, stop using it and contact Customer Support immediately (see page 26). • This humidifier is not to be used by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. • Supervise children when they are near the humidifier. • Children should not clean or perform maintenance on the humidifier without supervision. • Children should be supervised to ensure that they do not play with the humidifier. • Not for commercial use. Household use only. READ AND SAVE THESE INSTRUCTIONS 4 Power & Cord Electromagnetic Fields (EMF) • Ensure that the plug fits properly into a polarized socket. • Your humidifier has a polarized plug (one prong is wider than the other), which fits into a polarized outlet only one way. This is a safety feature to reduce the risk of electric shock. If the plug does not fit, reverse the plug. If it still does not fit, do not use the plug in that outlet. Do not bypass this safety feature. • Do not handle the power cord or plug with wet hands. Keep the plug and power cord away from liquids. • If the power supply cord is damaged, it must be replaced by Arovast Corporation or similarly qualified persons in order to avoid an electric or fire hazard. Please contact Customer Support (see page 26). • Unplugging the power cord will disable remote control of the humidifier and temporarily disconnect the humidifier from VeSync and other third-party apps. This humidifier complies with all standards regarding electromagnetic fields (EMF). If handled properly and according to the instructions in this user manual, the appliance is safe to use based on scientific evidence available today. SAFETY INFORMATION (CONT.) • Only add essential oils to the aroma pad. • Do not add essential oils, supplemental water treatment liquids, or water filters into the water tank or base chamber. This will damage the humidifier and cause leaks. Caution: Risk of Leaks and Electric Shock • Let nozzles and mist tube cool before touching or cleaning. Caution: HOT Water Vapor 5 GETTING TO KNOW YOUR SMART HUMIDIFIER A. Top Cover B. Nozzles C. Handle D. Water Tank E. Mist Tube F. LED Display G. Control Panel H. Base I. Water Filter J. Water Filter Sponge K. Heating Element L. Float M. Transducer N. Float Brackets O. Power Cord P. Noise Silencer Q. Absorption Pad R. Air Outlet S. Aroma Pad T. Aroma Box U. Humidity Sensor / Air Inlet (In Aroma Box Compartment) V. Air Inlet (Under the Base) W. Cleaning Brush X. Feet Y. Mist Channel (Under Water Tank) A C F G H W E T P Q R V S U I O J K N D B L X M Y 6 Wi-Fi® Indicator No Water Indicator On/Off Button Sleep Mode Indicator Warm Mist Button Sleep Mode Button Relative Humidity (RH) Percentage Warm Mist Indicators Mist Level Button Auto Mode Button Mist Level Indicators Auto Mode Indicator Mist Level Indicators (White) Low Mist Medium Mist High Mist Heat Off Low Heat Medium Heat High Heat Warm Mist Indicators (Orange…

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DATE:4/1/2022 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2ARBY-LV450S ProductName:LevoitVeSyncOasisMist TM SmartHumidifier RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommissionsrules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: Schematics  Blockdiagram Operationdescription BomList Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. <Signature> Name：ChrisHuang Title：SrManager,ProductCompliance Company：ArovastCorporation

DATE:4/1/2022 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 RE:LETTEROFAGENTAUTHORIZATION ToWhomItMayConcern: We,theundersigned,herebyauthorizeComplianceTesting,LLCtoactonourbehalfinallmatters relatingtoapplicationforequipmentauthorization,includingthesigningofalldocumentsrelatingto thesematters. Wealsoherebycertifythatnopartytotheapplicationauthorizedhereunderissubjecttothedenialof benefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseActof1988,21 U.S.C.853(a). Sincerely, <Signature> Name：ChrisHuang Title：SrManager,ProductCompliance Company ： Arovastcorporation

DATE:4/1/2022 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointESTTechnologyCo.,Ltd.Address:Chilingxiang,Qishantou, Santun,Houjie,Dongguan,Guangdong,Chinatoactasouragentinthepreparationof thisapplicationforequipmentcertification.Icertifythatsubmitteddocumentsproperly describethedeviceorsystemforwhichequipmentcertificationissought.Ialsocertifythat eachunitmanufactured,importedormarketed,asdefinedintheFederalCommunications Commission’sregulationswillhaveaffixedtoitalabelidenticaltothatsubmittedfor approvalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonour behalf,Iacknowledgethatallresponsibilityforcomplyingwiththetermsandconditions forcertification,stillresideswithArovastcorporationAddress:1202NMillerSt.,Suite A,Anaheim,CA92806,USA <Signature> Name：ChrisHuang Title：SrManager,ProductCompliance ApplicantCompany：Arovastcorporation

Arovastcorporation I,theundersigned,Chrishuang: Thefollowingmodelshavethesametechnicalconstructionincludingcircuitdiagram,PCB Layout,componentsandcomponentlayout,allelectricalconstructionandmechanical construction,exceptthedifferentmodelnumber、withorwithoutnightlightfunction. 1)ModelNo.:LUH-O451S-WUS 2)ModelNo.:LUH-O451S-WUSR 3)ModelNo.:LUH-O451S-XXXY(XXXmaybeA-Z,YmaybeA-Zornone) Note:LUH-O451S-WUSwithoutlightfunction,othermodelwithlightfunction.The hardwareisexactlythesame,butthesoftwareisdifferent. FCCID:2ARBY-LV450S Sincerely, Client’ssignature: Client’sname/title:ChrisHuang/SrManager,ProductCompliance Contactinformation/address:1202NMillerSt.,SuiteA,Anaheim,CA92806,USA Telephone:7145091019 FaxNo.:N/A

Arovastcorporation 1202NMillerSt.,SuiteA,Anaheim,CA92806,USA WIFIChannel12and13DeclarationLetter WedeclaretheequipmentidentifiedbelowwithregardstoChannel12and13capabilitiesfor FCCID:2ARBY-LV450S Declaration ProducthardwaredoesnothavethecapabilitytooperateonChannel 12and13. ProducthardwarehasthecapabilitytooperateonChannel12and13. However,thesetwochannelswillbedisabledviasoftwareandwillnot beaccessibletouser. ProducthardwarehasthecapabilitytooperateonChannel12and13. However,alltheoperatedchannelscan’tbechangedintheRF parameterviasoftware.Allchannelshavecompliedwithallofthe requirementssetsoutinFCCPart15.247. ProducthardwarehasthecapabilitytooperateonWiFiChannel12 and13,andmeetstherequirementsofKDB594280D01v02r01. Pleasenote: 1.)Bydefault,thisdeviceoperatesinamodethatiscompliantwith theU.S.requirements. 2.)Thisdevicewillalsousesupplementalinformationsuchasgeo- locationdatatodeterminethatitisoperatingoutsidetheU.S.,if necessary,tochangeitspower.Suchsupplementaldatawillbe derivedfromthefollowing: GlobalNavigationSatelliteSystem(GNSS)7sensorsinthedevice MobileCountryCode(MCC),8orMCCwithaMobileNetworkcode (MNC),receivedfromaCMRS9carrierandreceiveddirectlybya receiveronthedevice Countryinformationderivedfrommultipleadjacentaccesspoints(for exampleusingIEEEStd802.11dprovisions)maybepermittedon case-by-casebasis Othersuitablegeo-locationdatabasedonIPaddressesorother reliablesource. Name/Title:ChrisHuang/SrManager,ProductCompliance Signature: Telephone:7145091019 FaxNo.:N/A Date:4/1/2022

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FCC ID:2ARBY-A401S EST Technology Co. ,Ltd Report No. ESTE-R2203172 Page 1 of 5 FCC 47 CFR MPE REPORT Arovast Corporation Levoit VeSync OasisMist TM Smart Humidifier Model Number: LUH-O451S-WUS Additional Model: LUH-O451S-WUSR, LUH-O451S-XXXY (XXX may be A-Z, Y may be A-Z or none) FCC ID: 2ARBY-LV450S Applicant: Arovast Corporation Address: 1202 N. Miller St. Suite A, Anaheim, CA 92806, USA Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2203172 Date of Test: Feb. 15~Mar. 10, 2022 Date of Report: Mar. 14, 2022 FCC ID:2ARBY-A401S EST Technology Co. ,Ltd Report No. ESTE-R2203172 Page 2 of 5 Maximum Permissible Exposure 1. Applicable Standards Systems operating under the provisions of this section shall be operated in a manner that ensures that the public is not exposed to radio frequency energy level in excess limit for maximum permissible exposure. In accordance with 47 CFR FCC Part 2 Subpart J, section 2.1091 this device has been defined as a mobile device whereby a distance of 0.2m normally can be maintained between the user and the device. 1.1. Limits for Maximum Permissible Exposure (MPE) (a) Limits for Occupational/Controlled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times ︱E︱ 2 ,︱H︱ 2 or S (minutes) 0.3-3.0 614 1.63 (100)* 6 3.0-30 1842/f 4.89/f (900/f)* 6 30-300 61.4 0.163 1.0 6 300-1500 F/300 6 1500-10000 5 6 (b) Limits for General Population / Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength (E) (V/m) Magnetic Field Strength (H) (A/m) Power Density (S) (mW/cm 2 ) Averaging Times ︱E︱ 2 ,︱H︱ 2 or S (minutes) 0.3-1.34 614 1.63 (100)* 30 1.34-30 824/f 2.19/f (180/f)* 30 30-300 27.5 0.073 0.2 30 300-1500 F/1500 30 1500-10000 1.o 30 Note: f=frequency in MHz; *Plane-wave equivalent power density FCC ID:2ARBY-A401S EST Technology Co. ,Ltd Report No. ESTE-R2203172 Page 3 of 5 1.2. MPE Calculation Method E (V/m) = d G×P×30 Power Density: Pd (W/m 2 ) = 377 E 2 E = Electric Field (V/m) P = Peak RF output Power (W) G = EUT Antenna numeric gain (numeric) d = Separation distance between radiator and human body (m) The formula can be changed to Pd = 2 d×377 G×P×30 From the peak EUT RF output power, the minimum mobile separation distance, d=0.2m, as well as the gain of the used antenna, the RF power density can be obtained FCC ID:2ARBY-A401S EST Technology Co. ,Ltd Report No. ESTE-R2203172 Page 4 of 5 2. Conducted Power Result Mode Frequency (MHz) Peak output power (dBm) Peak output power (mW) Target power （dBm） Antenna gain (dBi) (Linear) GFSK 2402 7.41 5.508 7 ±1 3.42 2.198 2441 8.21 6.622 8±1 3.42 2.198 2480 8.49 7.063 8±1 3.42 2.198 8-DPSK 2402 10.13 10.304 10 ±1 3.42 2.198 2441 10.83 12.106 10±1 3.42 2.198 2480 11.11 12.912 11±1 3.42 2.198 BLE 2402 7.46 5.572 7 ±1 3.42 2.198 2440 8.11 6.471 8±1 3.42 2.198 2480 8.44 6.982 8±1 3.42 2.198 IEEE 802.11b 2412 22.34 171.396 22 ±1 3.42 2.198 2437 23.57 227.510 23±1 3.42 2.198 2462 23.45 221.309 23±1 3.42 2.198 IEEE 802.11g 2412 22.14 163.682 22 ±1 3.42 2.198 2437 22.97 198.153 22±1 3.42 2.198 2462 23.25 211.349 23±1 3.42 2.198 IEEE 802.11n HT20 2412 22.37 172.584 22 ±1 3.42 2.198 2437 23.22 209.894 23±1 3.42 2.198 2462 23.50 223.872 23±1 3.42 2.198 IEEE 802.11n HT40 2422 22.50 177.828 22 ±1 3.42 2.198 2437 22.86 193.197 22±1 3.42 2.198 2452 23.07 202.768 23±1 3.42 2.198 FCC ID:2ARBY-A401S EST Technology Co. ,Ltd Report No. ESTE-R2203172 Page 5 of 5 3. Calculated Result and Limit Mode Target power (dBm) Antenna gain Power Density (S) (mW/cm 2 ) Limited of Power Density (S) (mW/cm 2 ) Test Result (dBi) (Linear) 2.4G Band GFSK 9 3.42 2.1980.00347 1 Complies 8-DPSK 12 3.42 2.1980.00693 1 Complies BLE 9 3.42 2.1980.00347 1 Complies IEEE 802.11b 24 3.42 2.1980.10983 1 Complies IEEE 802.11g 24 3.42 2.1980.10983 1 Complies IEEE 802.11n HT20 24 3.42 2.1980.10983 1 Complies IEEE 802.11n HT40 24 3.42 2.1980.10983 1 Complies End of Test Report

FCC ID: 2ARBY-LV450S EST Technology Co., Ltd Report No. ESTE-R2203170 Page 1 of 75 FCC PART 15C TEST REPORT FOR CERTIFICATION On Behalf of Arovast Corporation Levoit VeSync OasisMist TM Smart Humidifier Model Number: LUH-O451S-WUS Additional Model: LUH-O451S-WUSR, LUH-O451S-XXXY (XXX may be A-Z, Y may be A-Z or none) FCC ID: 2ARBY-LV450S Applicant : Arovast Corporation Address: 1202 N. Miller St. Suite A, Anaheim, CA 92806, USA Prepared By: EST Technology Co., Ltd. Chilingxiang, Qishantou, Santun, Houjie, Dongguan, Guangdong, China Tel: 86-769-83081888-808 Report Number: ESTE-R2203170 Date of Test: Feb. 15~Mar. 10, 2022 Date of Report: Mar. 14, 2022 FCC ID: 2ARBY-LV450S EST Technology Co., Ltd Report No. ESTE-R2203170 Page 2 of 75 TABLE OF CONTENTS Description Page TEST REPORT VERIFICATION......................................................................................................................... 3 1. GENERAL INFORMATION ................................................................................................................. 5 1.1. Description of Device (EUT) ........................................................................................................... 5 1.2. Antenna Information ........................................................................................................................ 5 1.3. Information of RF Cable .................................................................................................................. 5 2. SUMMARY OF TEST ......................................................................................................................... 6 2.1. Summary of test result ...................................................................................................................... 6 2.2. Test Facilities ................................................................................................................................... 7 2.3. Measurement uncertainty ................................................................................................................. 8 2.4. Assistant equipment used for test ..................................................................................................... 8 2.5. Block Diagram ................................................................................................................................. 8 2.6. Test mode ......................................................................................................................................... 9 2.7. Channel List ................................................................................................................................... 10 2.8. Power Setting of Test Software ...................................................................................................... 10 2.9. Test Equipment ............................................................................................................................... 11 3. MAXIMUM PEAK OUTPUT POWER ................................................................................................. 12 3.1. Limit ............................................................................................................................................... 12 3.2. Test Setup ....................................................................................................................................... 12 3.3. Spectrum Analyzer Setting ............................................................................................................. 12 3.4. Test Procedure ................................................................................................................................ 12 3.5. Test Result ...................................................................................................................................... 13 4. 20 DB BANDWIDTH ....................................................................................................................... 18 4.1. Limit ............................................................................................................................................... 18 4.2. Test Setup ....................................................................................................................................... 18 4.3. Spectrum Analyzer Setting ............................................................................................................. 18 4.4. Test Procedure ................................................................................................................................ 18 4.5. Test Result ...................................................................................................................................... 19 5. CARRIER FREQUENCY SEPARATION .............................................................................................. 24 5.1. Limit ............................................................................................................................................... 24 5.2. Test Setup ....................................................................................................................................... 24 5.3. Spectrum Analyzer Setting ............................................................................................................. 24 5.4. Test Procedure ................................................................................................................................ 24 5.5. Test Result ...................................................................................................................................... 25 6. NUMBER OF HOPPING CHANNEL .................................................................................................. 30 6.1. Limit ............................................................................................................................................... 30 6.2. Test Setup ..............…

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Con nducted Test Rad Rad diated Test ( diated Test ( (30-1000 M (Above 1GH MHz) Hz)