1. RDA5807 radio module, with noise elimination, bass enhancement, high sensitivity, low noise, strong anti-interference ability and other advantages 2. There are 15 sound gears with potentiometer adjustment, which can be adjusted to the sound that satisfies you 3. Digital tube display, more convenient to view radio channels and radio signal strength 4. With power-off memory, automatic search and storage function list management radio 5. With power saving mode, the radio is more energy-saving<br><br>Modify the search channel threshold to capture more radio signals Delivery is loose parts Product name: -017B upgraded RDA5807 radio production kit Power supply: 3 No. 7 batteries (batteries are not included in the delivery) or USB power supply (choose one of the two) Receive radio frequency band: 87-108MHZ Maximum operating current: about 250mA (when the volume is adjusted to the maximum) PCB size: 95.5x59mm Full set weight: about 136g Functional characteristics Colour:transparent Material:Acrylic<br><br>Package Contents: 1 set x DIY Radio Assembly Kit(with case)<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.