Specification AudioInput : AUX, 6.35mm, Microphone (type not specified) BatteriesIncluded : 1 BatteriesRequired : 1 Brand : SHIDU BulletPoint1 : 【 Voice Amplifier for Teachers 】Voice Amplifier has a compact size and light weight design. A True Original Voice Amplifier that amplifies your voice, the sound of wired microphone amplifier is clear, crisp, no noise and no distortion. BulletPoint2 : 【 Microphone Speaker 】Portable Voice Amplifier for teachers the max 18 watts powerful output could cover 15,000 sq.ft(1400 ㎡), kindly recommend use this portable headset microphone speaker system indoors like classroom,it's allowing up 150 people to hear you more clearly. BulletPoint3 : 【 Adjustable Microphone Headset 】This lightweight and adjustable wireless microphone headset is equipped with a flexible gooseneck design, which allows you to customize the distance between the microphone and your mouth, ensuring clear and consistent sound quality. BulletPoint4 : 【 Long Battery Life 】SHIDU Wireless Voice Amplifiere equipped with a high-capacity 2500mAh rechargeable Lithium-ion Battery. Voice Amplifier provides up to 10 hours of amplification. Perfect for long lectures, meetings,and events. BulletPoint5 : 【 Warm Tips and Warranty 】Please keep the speaker and mic for a distance and facing away each other to avoid the signal affected. We provide return and refund without reason in 30 days, and 36-month warranty, and lifetime technical support. Color : Black CompatibleDevices1 : Microphone CompatibleDevices2 : AUX-compatible audio devices ConnectivityTechnology : Bluetooth ConnectorType : XLR, Auxiliary, 1/4" TRS ExternallyAssignedProductIdentifier : 7454696395705 ExternallyAssignedProductIdentifier1 : 0860013203481 ExternallyAssignedProductIdentifier2 : 860013203481 Hazmat1 : LITHIUM ION BATTERIES CONTAINED IN EQUIPMENT Hazmat10 : CN_SmallLithiumIonBatteryInEquipment Hazmat11 : DE_SmallLithiumIonBatteryInEquipment Hazmat12 : EG_SmallLithiumIonBatteryInEquipment Hazmat13 : ES_SmallLithiumIonBatteryInEquipment Hazmat14 : FR_SmallLithiumIonBatteryInEquipment Hazmat15 : GB_SmallLithiumIonBatteryInEquipment Hazmat16 : IE_SmallLithiumIonBatteryInEquipment Hazmat17 : IN_SmallLithiumIonBatteryInEquipment Hazmat18 : IT_SmallLithiumIonBatteryInEquipment Hazmat19 : JP_SmallLithiumIonBatteryInEquipment Hazmat2 : UN3481 Hazmat20 : MX_SmallLithiumIonBatteryInEquipment Hazmat21 : NL_SmallLithiumIonBatteryInEquipment Hazmat22 : PL_SmallLithiumIonBatteryInEquipment Hazmat23 : SA_SmallLithiumIonBatteryInEquipment Hazmat24 : SE_SmallLithiumIonBatteryInEquipment Hazmat25 : SG_SmallLithiumIonBatteryInEquipment Hazmat26 : TR_SmallLithiumIonBatteryInEquipment Hazmat27 : US_SmallLithiumIonBatteryInEquipment Hazmat28 : ZA_SmallLithiumIonBatteryInEquipment Hazmat3 : II Hazmat4 : 9 Hazmat5 : AE_SmallLithiumIonBatteryInEquipment Hazmat6 : AU_SmallLithiumIonBatteryInEquipment Hazmat7 : BE_SmallLithiumIonBatteryInEquipment Hazmat8 : BR_SmallLithiumIonBatteryInEquipment Hazmat9 : CA_SmallLithiumIonBatteryInEquipment ItemName : SHIDU 18W Voice Amplifier for Teacher with Wireless Microphone Headset, Portable Bluetooth Speaker and Megaphone, Professional Power Amplifier System for Tour Guide, Speech, Yoga, Meeting ItemPackageDimensions_Height : 18.8976 centimeters ItemPackageDimensions_Length : 7.6962 centimeters ItemPackageDimensions_Width : 15.9004 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : power-amplifiers Manufacturer : SHIDU MaximumSupplyVoltage : 5.5 volts_of_direct_current MinimumSupplyVoltage : 1.8 volts_of_direct_current ModelNumber : H11 MountingType : Surface Mount MountingType1 : Tabletop MountingType2 : Floor Standing NumberOfBoxes : 1 NumberOfChannels : 2 NumberOfItems : 1 NumberOfLithiumIonCells : 1 PackageLevel : unit PackageTypeName : Surface-Mount Package PartNumber : H11 PowerSourceType : Battery Powered ProductDescription : SHIDU 18W Voice Amplifier for Teacher with Wireless Microphone Headset, Portable Bluetooth Speaker and Megaphone, Professional Power Amplifier System for Tour Guide, Speech, Yoga, Meeting ProductSiteLaunchDate : 2024-12-26T08:51:12.905Z SupplierDeclaredDgHzRegulation : not_applicable SupplyCurrent : 100 microamps UnspscCode : 52161520 Voltage : 5.5 volts WarrantyDescription : 1 year manufacturer.