Main control chip: STC15W408AS microcontroller, strong processing power<br> FM radio module: RDA5807M, covering the frequency range of 87.5-108MHz, achieving global frequency band compatibility<br> Amplifier: Use AXS2031 digital power chip to ensure high output power and low voltage stability as low as 2.5V<br> 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<br> 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> Two power supply methods:for Android USB-5V or 3V dry battery<br> Radio band: FM band<br> Frequency range: 87.5MHz-108MHz<br> Output power: mono 5W<br> Note: Only one of the two power supply methods can be selected<br> The product appearance and printed words may vary depending on the batch, but this does not affect use<br> note:Without 2xAA batteries, you need to prepare them yourself<br> Colour:As Shown<br> Material:Acrylic+PCB+electronic components<br> Package Contents:<br> 1 x FM Radio(Finished Product)<br> Only the above package content, other products are not included.<br> 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.