Same as lethal ammunition - instead of killing them, it is programmed to "down" them.
[No Armor]
1 shot - Body / Head
2~3 shot - Legs/Arms
[Tactical Vest]
2~3 shot - Body
2~3 shot - Legs/Arms
[Carrier Light]
3~4 shot - Body
2~3 shot - Legs/Arms
[~w/ Helmet]
1~2 shot - Head
^ Really depends on where you get hit.
Flat surface = 1 shot
Edge = 2 shot
Penetration (MX ; MXC have same penetration value as 5.56mm)
Penetrate (MX):
Thin metal fences
Wooden doors
Pretty much most of the houses (1 layer of wall)
White walls (commonly seen on major cities - 2meters in height)
Doors and glasses of certain vehicles : Offroad, Hatchback, SUVs, & Jeeps
etcs.
EDIT: It is a "rubber" round, not a taser.