A major seventh suspended second chord is composed using a root/1st, major 2nd, perfect 5th and a major 7th (or R/1-2-5-7) intervals played simultaneously. Generally written as CMA7sus2 or CMA(sus2), it is good practice to simply use an uppercase C with the uppercase letters MA followed by a super scripted 7sus2 to represent it in writing (ie: CMA7sus2).
The major seventh suspended second chord has a major tonality even though it lacks a 3rd degree, it's the major seventh interval that gives it this quality. If the major 2nd (suspended 2nd) is resolved to the major 3rd the major quality becomes even clearer.
It is not necessary to resolve the major seventh suspended second chord, it is merely a tonal tool we can use if required.
Major seventh suspended second chord profile
|Intervals||root/1st, major 2nd, perfect 5th, major 7th or R/1-2-5-7|
|Stability||Somewhat dissonant, unresolved|
|Common names (examples in C)||CMA7sus2, CMA(sus2)|
|C Major seventh suspended second chord voicing #2|