1. A reusable solar generator in a sunny area can charge the built-in battery, which is environmentally friendly and energy-saving 2. You can use the built-in large capacity 18650 battery or an ordinary Dry cell. The product has low power consumption, improved energy efficiency, and is stable. 3. It 's perfect for indoor, outdoor camping, squares, and areas without electricity, listening to music, and playing music. 4. With TF card and USB music playback function. 5. With a radio function (FM radio) to listen to music and radio. FM Radio: Frequency range:87-108MHz. With Bluetooth 5.0, it can play lossless music wirelessly. DESCRIPTION: 1. Equipped with USB and TF card play function, it can be connected to Bluetooth 5.0 for playback. 2. It supports playback formats:MP3, WMA 3. It is powered by a rechargeable battery800mAh and has two built-in solar panels. 4. DC 5V rechargeable, free charging cable. 5. Product output power:3W 6. Frequency range:87-108MHz 7. Weight:400g 8. Number of unilateral solar panels Power:5V 0.8W Colour:Black Material:ABS Size:10.5x9.5x11.5cm, Single sided solar panel size:100x46mm Package Contents: 1 * radio 1 * charging cable 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.