charge in real unit in lammps

hi dear users , in real units in lammps what isis the unit of electric charge ?
for example for oxygen in SPC/E that is -0.8476 , so what is the unit of this number ?
thanks all .

hi dear users , in real units in lammps what isis the unit of electric
charge ?
for example for oxygen in SPC/E that is -0.8476 , so what is the unit of
this number ?

http://lammps.sandia.gov/doc/units.html