The Andy Unearthly Resonator is a fantastic choice for all those who are looking to buy portable speakers online. It is great for anyone who is in need of a portable music player, because the Unearthly Resonator is both a speaker and a music player. It has an impedance of four ohms and a maximum power input of 20 watts. Its frequency range is 180 hertz to 20,000 hertz. It takes two hours to charge fully, and it does so via USB. It is green in color.