Specification AudioInput : 3.5mm headphone jack, microphone, RCA AudioOutputMode : Stereo AudioOutputType : FM Transmission Brand : ziaoou BulletPoint1 : AMT-MW207 medium wave transmitter is a simple AM signal source suitable for amateur electronics enthusiasts and radio enthusiasts. It uses a magnetic rod to transmit electromagnetic waves without an external antenna. It can be used to test ordinary medium wave radios in places where the radio signal is insufficient. As well as ore radios, it can also be used as an instrument for debugging medium wave radios. BulletPoint2 : This kit adopts full discrete circuit, which is especially suitable for students to learn the working principle, practice production and test; The variable capacitor uses a double-connected variable capacitor, and the two-connection parallel connection can obtain sufficient capacity; Using double-sided circuit, the board base is glass fiber material, the thickness is measured about 1.5-1.6mm, the pad is sprayed with tin, and it can be directly welded without grinding. BulletPoint3 : There is no need for an external antenna (tens of meters for medium wave), and the magnetic field leaked by the magnetic rod affects the receiver, which is easy to implement and the transmission distance is relatively short; There are many interfaces, designed with waveform test terminals, audio sockets, external power sockets, etc., which are easy to use and expand functions. It can be connected to an external power supply or installed with a battery for use. BulletPoint4 : The circuit is simple. It is only composed of common triodes and resistance-capacitance inductive components, without audio , which is easy to make; The sound quality is good. Within the rated transmission distance, the sound quality is close to that of FM broadcasting, and the signal-to-noise ratio is good. BulletPoint5 : This product has been revised for n times so far (mainly to modify the wiring of the circuit board and the circuit remains unchanged), and it is still in the process of continuous improvement. Usually minor and insubstantial modifications, such as slight movement of component positions and minor adjustments to wiring, will not change the version number, nor will they not be re-photographed and uploaded, hereby declare. BulletPoint6 : 【Note】: Since some parts of the product have been upgraded and revised in appearance, and both old and new versions of products in Amazon's inventory are currently in stock, so our delivery is random, no matter whether you receive an old or new version of the product, you don't need to worry, the function of the product is the same. Color : As Shown CompatibleDevices : Television, Computer, Laptop, MP3 Player, Stereo Systems, Sirius XM CompatibleWithVehicleType : All Vehicles with an FM Radio ConnectivityTechnology : Wireless ConnectivityTechnology1 : Bluetooth ConnectivityTechnology2 : USB ConnectorGender : Female-to-Female ConnectorType : USB 3.0 ControllerType : Button Control ControllerType1 : Google Assistant ControllerType2 : HomeKit ControlMethod : voice ExternallyAssignedProductIdentifier : 4712570404817 ExternallyAssignedProductIdentifier1 : 701715497108 ExternallyAssignedProductIdentifier2 : 0701715497108 ExternallyAssignedProductIdentifier3 : 085387100086 ExternallyAssignedProductIdentifier4 : 0085387100086 ExternallyAssignedProductIdentifier5 : 0685387092123 ExternallyAssignedProductIdentifier6 : 0685387092024 ExternallyAssignedProductIdentifier7 : 00685387092024 HardwareInterface : radio_frequency HardwareInterface1 : usb HardwareInterface2 : bluetooth HardwareInterface3 : bluetooth HumanInterfaceInput : buttons IncludesRemote : 1 InstallationType : Plug In ItemName : ziaoou 1 PCS MW Medium Wave Transmitter AM Radio Transmitter DIY Circuit Board AMT-MW207 525-1605KHz, 500395813 ItemPackageDimensions_Height : 5 centimeters ItemPackageDimensions_Length : 12 centimeters ItemPackageDimensions_Width : 10 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : mp3-player-radio-transmitters LongTermStorageInformation : LongTermStorage=42 Manufacturer : ziaoou Material : Silver Material1 : Plastic Material2 : Aluminum MfgWarrantyDescriptionLabor : 12 month ModelName : 500395813 ModelNumber : 500395813 NumberOfChannels : 198 NumberOfItems : 1 PartNumber : 500395813 PowerSourceType : Corded Electric ProductDescription : ziaoou The transmitter is equipped with a 3.5mm headphone signal cable, excluding batteries. Effect:This transmitter works very well within the effective distance (0.5-1 meters), and the sound fidelity is high, especially when using direct radios (such as our 636 and 68-1 single-tube radios) with our self-made high resistance The sound quality is not much different from the direct playback effect of the player. Product name:Experimental medium wave (amplitude modulation) transmitter Model:AMT-MW207 Frequency range:525-1605kHz Power supply voltage:6V Transmission distance:about 1 meter for superheterodyne medium wave radios, about 0.5 meters for direct and ore radios Power Suplly:4 AA alkaline batteries(Not included batteries) Colour:As Shown Material:Plastic Size:Circuit board size:78mmx85mm (length x width) Package Contents: 1 * AM radio transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. ProductSiteLaunchDate : 2020-01-04T10:34:47.210Z Size : Small Style : Modern SupplierDeclaredDgHzRegulation : not_applicable SupportedApplication : Remote control doors, wireless security alarms, wireless industrial control, wireless data transmission SupportsBluetoothTechnology : 1 UnitCount : 7.2312 WarrantyDescription : 12 MOMTH WirelessCommStandard : bluetooth