The CM5362 is the Bluetooth speaker from today. Made from fast growing wood (Bamboo), solar panel on the front or back-side as you like. And in case the sun let you down for a while, you can still charge the BT 3W speaker via the micro USB port and included charging cable. The battery capacity is 500mAh which will give you a play time for about 4 ~ 5 hours on 70% of the volume. The product itself can either be printed with soy ink or CO2 laser engraving, both eco-friendly. A great product which is functional ~ quality and useful which is the new standard nowadays. Produced under GRS (Global Recycled Standard 4.0) for the manufacturing, packaging, warehousing and trading. Certified ESTS on March 9th 2022