THE V SHADER IS DESIGNED FOR 7,9,11, OR 13 NEEDLE MAGNUMS, BUT CAN BE USED WITH SET-UPS OF AS MANY AS 36 NEEDLES OR MORE. THIS MACHINE HAS BROAD POWER BAND, SO IT CAN PUNCH MANY NEEDLES INTO THE SKIN EASILY, OR BE TURNED DOWN TO HIT SOFTLY ON AREAS THAT REQUIRE FINESSE.