The C-flat power chord (abbreviated "Cb5 chord") is a two-note chord consisting of the notes C♭ and G♭. The chord is formed by removing the major third from a C-flat major chord.
C-flat power chord
C-flat fifth chord
C♭omit3 C♭(omit3) C♭no3 C♭(no3)
Dyad (two-note chord)