From uBeam's website: "Through process of logical deduction, acoustic energy is the only type of energy that can be used for over-distance wireless power trans

From uBeam's website: "Through process of logical deduction, acoustic energy is the only type of energy that can be used for over-distance wireless power transmission. Since uBeam owns the entire ultrasonic wireless power space from an IP perspective, the world will have to leverage uBeam’s technology."