Description: Size InformationRadio Medium Wave Transmitter Board measures approx 7.1cmx9.3cm/2.80inchx3.66inchFeatureDIY AM Radio Experiment with Good Signal to Noise Ratio, 530-1600KHz TransmittingNo External Antenna RequiredRadio experimental medium wave transmitter without external antenna, rely entirely on the magnetic bar leakage of the magnetic field radio transmission to the radio.Easy To UseResistor parameters and matching transistor parameters have been match, as long as all the components are properly welded, you can work well, only need to adjust the band coverage.Professional AccessoriesDIY Medium Wave Transmitter Kit with audio cable, Power Supply 9V 2A DC Package Includes: 1 Transmitter1 Audio Cable Note: Please allow slightly errors 1-2cm differences due to manual measurement.