Main control chip: STC15W408AS microcontroller, strong processing power FM radio module: RDA5807M, covering the frequency range of 87.5-108MHz, achieving global frequency band compatibility Amplifier: Use AXS2031 digital power chip to ensure high output power and low voltage stability as low as 2.5V Voltage stability: 3.3V boost module maintains the best performance of microcontroller and digital display within the power supply voltage range of 2.5V to 5.5V 30CM universal antenna: can be rotated in any direction to adjust the reception of FM signals, greatly improving the sensitivity of the radio, and can achieve the best reception effect<br><br>Two power supply methods:for Android USB-5V or 3V dry battery Radio band: FM band Frequency range: 87.5MHz-108MHz Output power: mono 5W Note: Only one of the two power supply methods can be selected The product appearance and printed words may vary depending on the batch, but this does not affect use note:Without 2xAA batteries, you need to prepare them yourself Colour:As Shown Material:Acrylic+PCB+electronic components<br><br>Package Contents: 1 x FM Radio(Finished Product)<br><br>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.