Brand name of equipment used in v2k?

V2K, or "voice to skull" technology, is often associated with claims of transmitting sound directly into a person's head. However, there is no scientifically validated equipment or brand name specifically recognized for this purpose, as it largely exists in the realm of conspiracy theories and unverified claims. Most discussions around V2K reference experimental technologies, such as ultrasonic speakers or neuromodulation devices, but these are not officially branded for V2K use.