𝗧𝗵𝗲 𝘁𝗿𝘂𝘁𝗵 𝗮𝗻𝗱 𝘂𝗻𝘁𝗿𝘂𝘁𝗵 𝗮𝗯𝗼𝘂𝘁 𝘂𝗹𝘁𝗿𝗮𝘀𝗼𝗻𝗶𝗰 𝗮𝗻𝘁𝗶-𝗳𝗼𝘂𝗹𝗶𝗻𝗴 - 𝟵 - It is all about the OOMPF, the racket these transducers (also referred to as 'transponders') make. The more (ultrasonic) decibels you can bring into a seawater exposed surface, the more it vibrates and the better we can prevent biofilm and if there is no biofilm subsequently you cannot have mussel/barnacle/tubewurm infestations. Due to years of painstaking research Shipsonic