is to use photo acoustics and as a result we advanced the penetration not just by one order magnitude by more than one order magnitude more than almost two orders of magnitude now we're able to penetrate multiple millimeters even multiple centimeters so you're talking about not only skin level penetration but also organ level penetration I'll show you some more examples later like anything else we face the next challenge right we cannot penetrate beyond right now seven centimeters how do we target the next challenge this this limit is