Features 1Simple operation, easy to weld, with 43W speaker sound quality is better. 2, with RDA5807 radio module, with noise elimination, bass enhancement, high sensitivity, low noise, anti-interference ability and other advantages. 3, key adjustment, switch channel volume up and down, clear all channels and re-search and save the station. 4, there are 15 sound level adjustment, can be adjusted to your satisfaction with the sound. 5, LED lights show the operation status. 6, with power failure memory, automatic search and storage function. 7, Wide range of application, suitable for school teaching, cultivate interest, scientific research and development, DIY enthusiasts and so on. Specification Kit name: simple version of RDA5807 radio production kit Power supply: 3 No. 7 batteries or USB5V power supply (choose one) Receive radio frequency band: 87-108MHZ Maximum operating current: about 400mA (in the case of the sound is adjusted to the maximum) PCB size:95.5x59mm List 1 x Radio DIY kit loose partsDigital With Case