So when enough charge is transferred and a high enough voltage differential is reached, the charge can be suddenly transferred to another object when touched or when getting in close proximity of the another object. This ESD strike can be noticed by observing a little arc discharge or by feeling a little or larger zap when the voltage reaches at least 3000 volts, but an ESD strike of only 100 volts or less can cause harmful damages to an integrated circuit. So, since many ESD strikes do not reach 3000 volts, they happen much more often than usually anticipated by all of us because most of them will never be noticed.