From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
No. 19 and No. 20 fire the attack from their hands, specifically their Energy Absorption pads.
Photon Wave is named in the Budokai video game series and is one of Artificial Human No. 19's and Artificial Human No. 20's most powerful attacks.
It later appeared in Dragon Ball Heroes.
Photon Wave appeared in Dragon Ball: Daizenshū 7.