A computer, powerbank or other device with a USB port or a USB power adapter.
Plug the USB charging cable into a power adaptor or computer. Then place your phone on the charger and it will start charging.
Yes, the charger is wireless so it can charge the majority of phones made in the last years.
When purchasing a product made out of bamboo you not only purchase a natural, biodegradable product. You also support the growth of a plant that produces oxygen, reduces carbon dioxide in the air, has a low environmental footprint when produced, prevents drouth and creates jobs in developing countries.