1. Simple operation, easy welding, better sound quality with 4ohm 3W speaker 2. With RDA5807 radio module, it has the advantages of noise elimination, bass enhancement, high sensitivity, low noise, strong anti-interference ability, etc. 3. Button adjustment, switch channel volume increase and decrease, clear all channels and search and save channels again 4. There are 15 sound gear adjustments, which can be adjusted to the sound that satisfies you 5. LED lights show the operating status With power-off memory, automatic search and save functions. Kit name:RDA5807 radio production kit Power supply:3 x AAA batteries or USB 5V power supply (battery not included) Receive radio frequency band:87-108MHZ Maximum operating current:About 400mA (with the volume turned up to the maximum) Note: This is a DIY kit, you need to assemble it yourself. Different batches may have different silk screen printing/appearance, which will not affect the use. Colour:Red & Transparent Material:PCB+electronic components+acrylic Package Contents: 1 * Radio DIY kit(Shipping in disassembled, requires assembly before use.) 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.