The type-2 of this weapon had a max power setting of 16 & could be set to heat, disrupt or stun
[DOC] [TLE] Phaser | Memory Alpha | Fandom powered by Wikia [PAR] Most phasers were classified as particle weapons and fire nadion particle beams, 
... (TOS: "Where No Man Has Gone Before") In 2269, starship bridges were 
defended by ...